To find the right proposal !
Internship and thesis proposals
Criteria for selection
Number of proposals
62
1
Modeling and controlling collective decision making in animals and humans
Domaines
Statistical physics
Biophysics
Physics of living systems
Non-equilibrium Statistical Physics
Type of internship
Théorique, numérique Description
This project will study collective decision making in groups of interacting animal and/or human. Specifically, it will include analyzing real experimental data in social mice and/or in pedestrian dynamics, using a combination of agent based model and statistical inference to build interaction models that explains the observed collective behavior, analyzing the information flow between individuals of the group using techniques from causality analysis and information theory, and designing plausible probes to be implemented by experimental collaborators to perturb and control the collective behavior. It may also include investigating toy models to study the impact of perturbation on collective decision making. The candidate is expected to have experience of coding, solid background in statistical physics, and motivation to work closely with data. This internship will be supervised by Xiaowen Chen, CNRS researcher at LPENS.
Contact
Xiaowen Chen
31/10/2025
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Thesis :
Funding :
2
Extended-depth-of-focus for longer single-molecule tracking in cell nuclei
Domaines
Biophysics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Single-molecule tracking (SMT) inside the cell nucleus is a powerful approach to probe DNA repair mechanisms and transcription factor (TF) regulation at the nanoscale. A central limitation in high-NA objectives necessary for single-molecule microscopy is the short depth of focus (DoF), which causes tracked molecules to leave focus prematurely, shortening trajectories and biasing dynamic readouts.
This internship aims to extend the depth of focus in single-molecule localization microscopy (SMLM) and SMT without sacrificing photons by using a deformable mirror (DM) at a pupil- conjugate plane to implement smooth, phase-only masks. The goal is to achieve 2x-5x axial PSF extension with minimal lateral broadening so that single emitters remain observable for longer, enabling longer, less-biased SMT traces in the nucleus.
Contact
Ignacio Izeddin
31/10/2025
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Thesis :
Funding :
3
Multipartite entanglement in semiconductor high harmonic generation
Domaines
Quantum optics/Atomic physics/Laser
Quantum optics
Metrology
Type of internship
Expérimental Description
Quantum information science and imaging technologies reach some bottleneck due to limited scalability of non-classical sources. Generally, multipartite entanglement with N>2 suitable for quantum applications is difficult to achieve because of the low efficiency of the traditional schemes. The quantum nature of strong field processes occurring in high harmonic generation (HHG) has recently revealed the possibility of generating massively entangled quantum states that should come as a frequency comb of N entangled photons [Gor20].
Intrinsically, the HHG emission comes as a frequency comb and should exhibit N-partite entangled photons. Practically, the internship project will consist in extensively study the non-classical properties of the HHG process in a semiconductor for N>2. In the process, each emitted photon is a superposition of all frequencies in the spectrum, i.e., each photon is a comb so that each frequency component can be bunched and squeezed. The candidate will first develop and test entanglement and quantum correlations using the violation of Cauchy-Schwartz inequality. We will verify genuine multipartite entanglement of the photons in the time/frequency domain, by correspondingly measuring the longitudinal position as well as the frequency bandwidth. The approach will be further extended to verify multi-partite entanglement between even more optical modes.
Contact
Hamed Merdji
29/10/2025
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Thesis :
Funding :
4
Statistical physics of chemically active mixtures
Domaines
Statistical physics
Biophysics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Physics of living systems
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Type of internship
Théorique, numérique Description
Near criticality, binary mixtures exhibit large composition fluctuations with spatial correlations. Introducing mobile catalysts that promote interconversion between the two components is expected to drive the system out of equilibrium, potentially altering its fluctuation spectrum. Understanding how such diffusing reactive agents, whose dynamics and coupling to the underlying fields can be represented explicitly, modify spatial correlations is the central objective of this project.
The internship will focus on constructing and analyzing a theoretical model describing a near-critical binary mixture coupled to mobile catalysts. The mixture will be represented by continuous concentration fields obeying model B (conserved) stochastic dynamics derived from a Gaussian free energy. Catalysts will be modeled as diffusing sources and sinks that locally bias the A ↔ B conversion reaction.
Analytical methods (such as stochastic field theories, Langevin equations, perturbative expansion) will be used to determine how catalyst motion modifies the two-point correlations of the fields. Particular attention will be paid to identifying possible long-range, non-equilibrium correlations emerging from the interplay between diffusion and reaction, and to investigating their consequence on tracer diffusion and fluctuation-induced forces, like the one evidenced recently in externally driven systems.
Contact
Pierre ILLIEN
29/10/2025
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Thesis :
Funding :
5
Anisotropic effects on the rheology of foams containing fibers
Domaines
Soft matter
Type of internship
Expérimental et théorique Description
Emerging efforts at reducing water consumption in water-based industrial processes have led
to an increased use of foams as a carrier in replacement of plain water in which particles or
drops are dispersed. Yet, this use of foams, which consists in dispersion of bubbles in a liquid
stabilized with surfactants, requires to revisit their behavior under flow when they contain
particles or drops. In this framework, the case of fibers being dispersed in foams is of
particular interest because strong anisotropic effects are expected under flow. Indeed,
viscous shear is likely to orient the fibers in the flow direction, leading to anisotropic effects.
In this internship, we aim at measuring the structural and rheological response of foams
containing fibers under shear. To do so, several experimental configurations will be studied
and compared. (i) Classical rheology measurement between plates or coaxial cylinders. (ii)
Flows in millifluidics. In both cases, we will couple the rheological measurement with direct
visualization.
Several physical-chemical parameters will be used to gain insights into the behavior of the
system : the fiber and gas volume fractions, the amount of surfactant, the viscosity of the
continuous phase, the fiber length.
Contact
Emilie VERNEUIL
28/10/2025
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Thesis :
Funding :
6
Charge carrier dynamics in ZnO nanopowders: influence of oxygen vacancy charge states probed by femtosecond transient absorption spectroscopy
Domaines
Condensed matter
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Contact
Anna LEVY
28/10/2025
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Thesis :
Funding :
7
Polarization Functional for Water at the Electronic Scale
Domaines
Condensed matter
Statistical physics
Physics of liquids
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Théorique, numérique Contact
Hélène Berthoumieux
28/10/2025
/
Thesis :
Funding :
8
Machine-Learning Force Fields and Simulation Methods for the Dielectric Properties of Water
Domaines
Condensed matter
Statistical physics
Physics of liquids
Nonequilibrium statistical physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Théorique, numérique Contact
Hélène Berthoumieux
28/10/2025
/
Thesis :
Funding :
9
Advection and diffusion in complex, near-surface media
Domaines
Condensed matter
Statistical physics
Biophysics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Type of internship
Expérimental et théorique Description
The dynamics of disordered systems are ubiquitous in condensed matter physics, from glasses to intracellular media. The former example is one of a complex, multicomponent mixture undergoing constant decomposition and regeneration thanks to biochemical and physicochemical energy inputs. Within this mixture, each species is transported according local fluctuations and global movements due to an external flow, say. Taking as an emblematic object within this transport scenario, a protein molecule is an object with scale of some nm, always near surface and subject to advective and diffusive motions.
We will experimentally study an abstract version of the the complex intracellular scenario described above. Fluorescent nanoparticles take the role of a biomacromolecule, microfluidic channels are used to provide interfaces and global flow, while dual input channels serve to prepare non-equilibrium mixtures akin to the intracellular matrix. We use particle tracking to observe (i) the microscopic and local diffusive dynamics, and (ii) the advective transport there. To observe these phenomena, we use the experimental and surface-sensitive technique total internal reflection fluorescence microscopy. We thus achieve 3D, nanometrically resolved particle dynamics in near-wall, microfludic flows. Our study will bring first measurements on the impact of realistic phase decomposition dyamics at the particle level in these emblematic complex flow scenarios.
Contact
Joshua MCGRAW
27/10/2025
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Thesis :
Funding :
10
Anyonic Statistics in Fractional Quantum Hall Systems
Domaines
Condensed matter
Low dimension physics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Type of internship
Théorique, numérique Description
Fractional quantum Hall systems host quasiparticles carrying fractional charge and obeying anyonic statistics—excitations that interpolate between bosons and fermions. While fractional charge has been accurately measured, the direct observation of anyonic braiding remains an open challenge. Two main approaches have been pursued: spatial braiding in interferometers, which are highly sensitive to Coulomb and geometric effects, and temporal braiding through current cross-correlations in Hanbury–Brown–Twiss or “anyon collider” setups, which suffer from model-dependent interpretations.
The Unifying Nonequilibrium Perturbative Theory (UNEPT) offers a comprehensive framework to describe these systems beyond the Tomonaga–Luttinger liquid model that fails to capture most experimental situations. It yields a novel braiding fluctuation–dissipation theorem (FDT) that enables extraction of the anyonic braiding phase from measurable quantities such as noise and admittance.
This project aims, on one hand, to extend this braiding FDT to time- and space-resolved probes of braiding under finite DC and AC drives, and on the other, to apply UNEPT to interferometric geometries to address spatial braiding, shown recently to be more robust than its temporal counterpart. The student will receive training in advanced quantum transport theory and collaborate with experimental groups to design realistic detection protocols for anyonic statistics.
Contact
Inès Safi
24/10/2025
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Thesis :
Funding :
11
Electrical networks dynamics via a quantum analogy
Domaines
Condensed matter
Statistical physics
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Type of internship
Théorique, numérique Description
The goal of this project is to build on the analogy between the electrical grid linearized equations
and a Schrödinger like equation, opening the way to use numerical techniques designed for quantum systems in the physics of powergrids. Using these tools, we wish to study the propagation of fluctuations
in the network but also see how one could tackle the dynamics in the non-linear regime by extending these methods.
Contact
Guillaume Roux
Laboratory : LPTMS - UMR 8626
Team : Disordered systems, soft matter, interface physics
Team Website
Team : Disordered systems, soft matter, interface physics
Team Website
24/10/2025
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Thesis :
Funding :
12
Theory of atom-photon and spin-photon interfaces : from cavity-QED to waveguide-QED
Domaines
Quantum optics/Atomic physics/Laser
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Type of internship
Théorique, numérique Description
The rise of cavity-QED has made it possible to fully exploit the light-matter interaction, at the most fundamental level: single atoms and single photons.
Our team in C2N has developed quantum-dot-based interfaces which can be used as efficient emitters of single photons, leading to the creation of the company Quandela. A strong challenge remains: developing quantum nodes that implement logic operations on incoming photons, using the interaction with a single stationary qubit.
During the last decade, we have also built a practical theoretical toolbox, allowing to simulate the cavity-QED effects in light-matter interfaces. By doing so, we made a theoretical breakthrough: it becomes possible to exactly describe many complex cavity-QED phenomena, with the much simpler and practical framework of waveguide-QED. This allows implementing numerical and analytical strategies which were previously out of reach.
During this internship we want to explore the potential of this breakthrough, extending it to the study of spin-photon interfaces and to the strong-coupling regime of cavity-QED.
Contact
Loïc Lanco
23/10/2025
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Thesis :
Funding :
13
Helicity-Preserving Scattering and the Onset of Localization of Electromagnetic Waves in Disordered Media
Domaines
Condensed matter
Statistical physics
Topological materials, Quantum Transport, Cavity Quantum Electrodynamics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Description
The project aims to explore the role of helicity conservation in electromagnetic transport through disordered media. Recent theoretical work suggests that when scattering preserves the helicity (handedness of circular polarization) of electromagnetic waves, Anderson localization can be inhibited, leading to a form of topological delocalization. This phenomenon has never been experimentally tested. The proposed internship will contribute to the preliminary design and modeling steps required to build a microwave platform capable of investigating this effect.
Contact
Geoffroy Aubry
22/10/2025
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Thesis :
Funding :
14
Flow-induced dynamic instabilities in Kirigami
Domaines
Soft matter
Physics of liquids
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
In engineering, flexible components are increasingly favored over rigid ones for devices operating in fluid flow. Their ability to deform enhances resilience to changing conditions, and can improve aerodynamic performance, or support a range of operational modes. However, controlling their complex deformations under fluid loading presents significant design challenges, requiring innovative approaches. Work in LadHyX has shown the potential of kirigami—where cut patterns are introduced into flat materials—to create tunable poroelastic structures, providing effective control for passive shape adaptation in fluid environments. While past studies have mainly explored static shape changes, this internship seeks to broaden the focus to include the dynamic response of kirigami structures in fluid flow.
Contact
Sophie Ramananarivo
22/10/2025
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Thesis :
Funding :
15
WearFLOW: a portable laser speckle imager for microcirculation dynamic monitoring
Domaines
Biophysics
Physics of liquids
Physics of living systems
Hydrodynamics/Turbulence/Fluid mechanics
Metrology
Type of internship
Expérimental Description
We are offering an M1/M2 internship in the Biophotonics group at LCF to design a portable laser imager based on laser speckle contrast imaging (LSCI). LSCI maps 2D blood flow at high spatial and temporal resolutions. So far, clinical devices are bulky and must be handheld limiting their use. The goal of the internship is to overcome these limitations by making this modality portable and attachable to the patient's arm, avoiding constraints related to movement and facilitate measurements in real-world conditions, particularly during physical activity.
The project involves methodological and scientific challenges :
• Design and assemble a prototype incorporating optics and photonics components.
• Develop test protocols on several microfluidic chips (custom made in the laboratory, without a clean room) simulating blood capillaries and surrounding tissue to evaluate the prototype ability to monitor microcirculation
• Evaluate the impact of different hypotheses on light scattering in tissues on the biophysical models used to evaluate the microcirculation
The skills you will be able to strengthen or acquire are :
• Design and integration of photonic instruments.
• Optical and electronic characterization of biomedical systems.
• Experimental protocols on original microfluidic chips.
• Teamwork in a multidisciplinary research environment.
The internship may lead to a PhD, through application to already identified PhD grant funding opportunities.
Contact
Frederic PAIN
22/10/2025
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Thesis :
Funding :
16
2D Superconducting Spintronics
Domaines
Condensed matter
Type of internship
Expérimental et théorique Description
Superconducting spintronics (and spin caloritronics) is an emergent field at the intersection of spin(-orbit) physics and superconductivity, traditionally studied in metals. Van der Waals materials, which can be exfoliated down to the monolayer limit, and cover the whole gamut of electronic properties, open new possibilities for the study of superconducting devices and unconventional superconductivity. Our collaboration has shown that semiconducting transition metal dichalcogenides (TMDs) are excellent tunnel barriers, which we have used, inter alia, to obtain spectral evidence for a possible equal-spin triplet superconducting (ESTS) state in the TMD NbSe2. Recently, magnetism has been demonstrated in in few-layer 2D materials (CrSBr, VX2…). Such magnetic properties were used for efficient spin-filtering in devices with magnetic insulators such as CrI3.
We offer 2 possible projects related to the interplay of spins and superconductivity (see pdf).
Candidates should have a strong background in quantum mechanics and condensed matter physics, and solid laboratory experience. Familiarity with nano-fabrication, vdW materials and low-noise low-temperature electronic transport would be a plus.
This co-supervised project is part of a long-standing collaboration between the Université Paris-Saclay (Charis Quay et al.) and the Hebrew University (Hadar Steinberg et al.).
Contact
Charis Quay
21/10/2025
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Thesis :
Funding :
17
Flows in ultra-thin polymer films
Domaines
Soft matter
Physics of liquids
Type of internship
Expérimental Description
The stability and homogeneity of liquid films is crucial to processes producing coatings. In the case of silicone oils, a rough estimate of the long-range interactions such as Van der Waals’ shows that such films should bear a uniform thickness at equilibrium: repulsive interactions should tend to a flat thick film. However, in practical situation, initially heterogeneous films never get uniform in a timely manner. As examples, defects on glass substrates lead to thickness heterogeneities that grow over time rather than heal. When starting from a collection of droplets sprayed onto a flat substrate, a nanometer-thick film first spreads around the droplets, and delays the spreading and coalescence of droplets.
The goal is to gain insights into the behavior of polymer melts on glass and to elucidate the mechanisms underlying the time evolution of droplets spreading. To do so, model systems will be used (plane glass or silicon wafers, well-characterized polymers), and experiments will be performed in order to measure the thickness profiles over time with advanced imaging techniques. Modelling of the transfers will then be developped to account for the data.
Two cases will be particularly studied
- Time evolution of oil spread onto substrates decorated will well-controlled defects
- Spreading dynamics of several droplets deposited on smooth substrates.
Contact
Emilie VERNEUIL
17/10/2025
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Thesis :
Funding :
18
Optical trapping of micro and nano-particles in air
Domaines
Quantum optics/Atomic physics/Laser
Type of internship
Expérimental Description
The optical forces created by a focused beam enable micro and nanoparticles to be levitated and trapped. The construction of a levitation setup in air will enable the movement of the particle in the trap and its internal vibration modes to be studied.
Contact
Benjamin Besga
17/10/2025
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Thesis :
Funding :
19
Advanced Nanorheology for Clinical Impact: Molecular rotors as diagnostic tools for red blood cell pathologies
Domaines
Statistical physics
Biophysics
Soft matter
Physics of living systems
Type of internship
Expérimental et théorique Description
This project investigates intracellular nanorheology using molecular rotors—fluorescent probes whose rotational dynamics quantify local viscosity at the nanoscale. Our team at MSC laboratory has developed the application of these probes to measure rheological properties within red blood cells. This approach allows quantitative assessment of red blood cell mechanical properties and detection of pathological alterations in sickle cell anemia and spherocytosis.
Contact
Berengere ABOU
16/10/2025
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Thesis :
Funding :
20
How do ants adapt their chemical "social passport" to environmental changes?
Domaines
Biophysics
Soft matter
Physics of living systems
Type of internship
Expérimental Description
This project investigates the relationship between the rheological properties and chemical composition of cuticular hydrocarbons in ants under acclimatization conditions. By combining approaches from physics, chemistry, and biology, we aim to understand how these social insects adapt their chemical profiles in response to environmental changes.
Research activities:
-Characterize the rheological behavior of ant cuticular hydrocarbons
-Analyze the correlation between physical properties and chemical composition
-Study adaptation mechanisms under varying environmental conditions
-Employ interdisciplinary methods spanning soft matter physics and chemical ecology
Research environment:
Location: Laboratoire Matière et Systèmes Complexes (MSC), Paris 13e
International collaboration with the Institute of Organic and Molecular Evolution
Optional mobility: Short-term research stay at the University of Mainz (Germany) for chemical and behavioral analyses
Key aspects:
Interdisciplinary approach
International and collaborative research framework
Opportunity to gain expertise in complementary experimental techniques
Contribution to fundamental understanding of social insect communication
Contact
Berengere ABOU
16/10/2025
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Thesis :
Funding :
21
Bell nonlocality as a resource for quantum technologies
Domaines
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Type of internship
Théorique, numérique Description
While bell inequalities are of crucial importance for understanding the quantum features of nature, they also have technological applications in fields such as quantum communication. In this internship, we aim to explore some more unusual uses of this strict type of nonlocality. In particular, we will study the constraints that a local hidden-variable model imposes on a system and how these limitations affect what we can do with it.
One possible direction of the internship is to explore the limitations of local hidden-variable models in quantum state engineering. Are there certain properties that cannot be heralded without nonlocality?
An alternative direction is to focus on the setting of quantum parameter estimation. Provided that the statistics of Alice and Bob is described by a local hidden-variable model, does this put limitations on the precision with which they can jointly estimate certain parameters of their system? If so, can these limits be surpassed in nonlocal states, thus leading to a metrological Bell inequality?
Contact
Mattia Walschaers
15/10/2025
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Thesis :
Funding :
22
Centrifuge decelerator of radioactive molecules & atoms for fundamental symmetry
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Expérimental Description
Precision metrology on atoms and molecules benefits tremendously when the particles are prepared in the ultracold regime. This enables control and detection of atoms or molecules at the single-quantum-state level. In this project, we are developing a unique method to decelerate radioactive atoms and molecules to a standstill by centrifugal force. A spinning magnetic guide will be used to guide neutral atomic/molecular species from the periphery to the center of the rotating frame, and an electromagnetic trap will be used to collect the decelerated particles after they exit the centrifuge decelerator. This work will open the avenue to precision spectroscopy of superheavy species like Radium or Thorium containing molecules, as well as light species like Tritium atoms.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
23
Constraining the 12C(α,𝛾)16O fusion by analyzing transfer data with quantified uncertainties
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Théorique, numérique Description
Fusion processes involving α-particles are central to understanding the lifecycle of massive stars and the
formation of heavier elements. Directly measurements of these reactions are very difficult and most of
the time impossible as the Coulomb repulsion between the nuclei suppresses the reaction probability.
Instead, these reaction rates are often evaluated using nuclear properties inferred from transfer reactions
measurements in which an α- particle is transferred to the nucleus of interest. The quality of these
evaluations depends strongly on the accuracy of the reaction theory used to interpret these transfer data.
In this project, the student will use nuclear reaction models to analyse 12C(7Li,t)16O transfer reaction data.
In this process, they will quantify the uncertainties associated with the inputs of these models onto
12C(7Li,t)16O transfer cross sections, using Bayesian statistics. By comparing their predictions to
12C(7Li,t)16O data, they will infer constraints for the 12C(α,𝛾)16O fusion rate.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
24
Precision laser spectroscopy of ThO molecules for testing fundamental symmetries
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Expérimental Description
Measurements of electric dipole moment (EDM) of fundamental particles place the most stringent constrains on time-reversal violating new physics beyond Standard Model. Precision spectroscopy on cold 232ThO neutral molecules provides one of the best bounds on electron electric dipole moment. In addition, 227ThO neutral molecules provides excellent opportunity to search for nuclear Schiff moment. In this project, the student will be developing the laser and optics system for performing precision spectroscopy measurement on cold ThO molecules. The project will also involve development of the vacuum beamline and cryogenic system necessary to produce the ThO molecules.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
25
Development of surrogate models for expensive calculations
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Théorique, numérique Description
The incoming student will work on using dimensionality reduction techniques to develop surrogate models for expensive numerical calculations (see https://www.frontiersin.org/articles/10.3389/fphy.2022.1054524/full, and https://journals.aps.org/prc/abstract/10.1103/PhysRevC.109.044612). The approach will follow a series of recent data-driven approaches (see https://arxiv.org/abs/2502.03680, https://arxiv.org/abs/2406.04279, and https://youtu.be/XiRFiH-7MG8?si=rcyS-sU4eZVEgjWa&t=1321). If the student comes with a specific model/simulation in mind the project will focus on creating an emulator for that, but other options are available ranging from reactions, nuclear structure calculations, nuclear astrophysics, and experimental control. We expect that after the end of the program the student will be able to bring to their home institution the knowledge to apply dimensionality reduction techniques to speed up computations and tailor them to their specific needs. If progress during the three month period was effective, we also expect to write a publication with the findings.
Expected incoming student skills: Intermediate coding experience in at least one language (python, Mathematica, c++, fortran). Basic knowledge of differential equations.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
26
Experimental studies of nuclear reactions to understand astrophysical processes
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Expérimental Description
My group works in the field of Nuclear Astrophysics. We focus on measuring nuclear physics properties that drive astrophysical processes. We collaborate with astronomers and astrophysicists to identify important nuclear reactions that affect the evolution/explosion of stars and the production of elements. Based on this input we design and run experiments to study these nuclear reactions. A student working in my group can choose one of our existing projects such as detector testing/development (if available), analysis of existing data, and/or theoretical calculations that relate to these nucleosynthesis processes. Programming experience is desired but not required. Through this project students will gain understanding of astrophysical processes and how they connect to nuclear experiments, gamma ray spectroscopy, nuclear reactions and beta-decays.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
27
Study of phenomena arising along the neutron dripline
Domaines
Nuclear physics and Nuclear astrophysics
Type of internship
Expérimental Description
The MoNA collaboration (https://www.monacollaboration.org/) is one of the world leaders in the study of nuclei at and beyond the neutron dripline. After 20 years of operation at NSCL, the MoNA collaboration performed its first experiments within the FRIB era in the Summer 2025. In particular, the Collaboration is interested in the evolution of the nuclear structure while moving away from stability as well as in the underlying mechanism describing the formation of neutron halo in some weekly bound nuclei. Two more experiments using the MoNA-Sweeper setup and its Si-Be segmented target are scheduled in the Spring 2026. The proposed internship is two-fold: (i) a primary project to perform preliminary investigations of an LH2 target/tracker design and compare (un)polarized beams impinging on such target for the MoNA Collaboration, and (ii) a secondary project to assist in some of the offline analysis/post-tests for the experiments mentioned above.
The registration for the internship must be done on the website: https://npa.in2p3.fr/summer-training-program/
Contact
Jérôme Margueron
Laboratory : IRL-NPA - IRL2024
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
Team : International Research Laboratory for Nuclear Physics and Nuclear Astrophysics
Team Website
14/10/2025
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Thesis :
Funding :
28
Spreading of bacterial colonies on gels
Domaines
Biophysics
Soft matter
Nonequilibrium statistical physics
Physics of living systems
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
At the scale of bacteria moving across surfaces, capillary forces are enormous, many times their flagellar propulsion force. During the internship we will investigate how bacteria collectively overcome this dominating constraint. To start with, we will study the spreading of drops on hydrogels, and study the flows induced by chemical gradients. A just acquired confocal chromatic probe, coupled to stuctured light profilometry, will be used to characterise the non-dispersive swelling front that precedes the bacterial spreading. If time permits we will compare the observations to experiments involving bacteria.
The wider aim of the proposed PhD thesis is to quantify the forces at play during mass swarming of Bacillus subtilis, notably by controlling the dominant capillary forces. Our improved understanding of microscopic interactions will then be used, in collaboration with Pr J Tailleur (MIT&MSC), to develop coarse-grained statistical active matter models for the colony morphogenesis.
Contact
Adrian Daerr
10/10/2025
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Thesis :
Funding :
29
Spin-orbit coupling in MXene thin films
Domaines
Condensed matter
Low dimension physics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
The aim of this internship is to measure and strengthen the spin-orbit coupling in thin films made of MXenes, of formula Ti3C2Tx, which are 2D materials with a metallic character, unlike the usual 2D materials (graphene, TMD, etc.). The aim is to measure resistance variations at low temperature (2 K) and under magnetic field (9 T) in the weak localization regime (quantum interference of free electron wave functions). To do so, impurities with a strong spin-orbit coupling, such as low concentrations of gold or platinum atoms, will be deposited on top of the MXene layer in an evaporation chamber, before characterizing these thin films in the cryostat. The detection and manipulation of the strength of the spin-orbit coupling in MXenes would be a major first, paving the way for applications of these materials in spintronics.
Contact
Simon Hurand
Laboratory : Institut Pprime - UPR 3346
Team : Physique et Propriétés des Nanostructures
Team Website
Team : Physique et Propriétés des Nanostructures
Team Website
10/10/2025
/
Thesis :
Funding :
30
Resonance broadening in self-gravitating systems
Domaines
Statistical physics
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Type of internship
Théorique, numérique Description
The long-term relaxation of a long-range interacting N-body system is generically described by the inhomogeneous Balescu-Lenard equation (BL), which captures the lasting effects of two-body resonances. Yet, BL is ill-posed in the presence of flat frequency profiles, i.e. within "over-resonant" systems. In that case, one must resort to "resonance broadening theory" to include the contributions from nonlinear effects -- neglected in BL -- to self-consistently regularise BL's (sharp) resonance condition.
This internship focuses on exploring, analytically and numerically, the effect of resonance broadening in low-dimensional long-range interacting systems. For that purpose, we will focus on the model of classical Heisenberg spins evolving on the unit sphere withn different external profiles, in the limit of weak collective amplification. In practice, we will explore analytically the nonlinear origin of resonance broadening, using stochastic theory, emphasising the existence of anomalous scaling with respect to N. In parallel, we will use extensive numerical simulations with varying total number of particles and dynamical temperature, to explore the extent of resonance broadening, and its possible saturation. Ultimately, this program of research will offer new clues on the validity of the different quasilinear assumptions on which BL relies.
Contact
Jean-Baptiste Fouvry
10/10/2025
/
Thesis :
Funding :
31
Drop impact on a pool of immiscible liquid
Domaines
Condensed matter
Biophysics
Soft matter
Physics of liquids
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Théorique, numérique Description
Drop impact on a pool of immiscible liquid
Context: The impact of a liquid drop onto a liquid surface is a commonly observed phenomenon in nature and throughout daily life, and is important for many industrial processes such as spray painting, inkjet printing and spreading of pesticides. It has been demonstrated recently that this process could be used for the mass production of particles with complex shapes and cell encapsulation [1]. The geometry of the resulting particles strongly depends on the impact dynamics and the deformation of the interfaces.
Goals: In this project, we propose to investigate the formation of complex encapsulations formed by the impact of a liquid drop on a pool of immiscible liquid. We will systematically study the impact of water drops on a pool of an immiscible liquid such as silicone oil. We will combine high-speed imaging experiments with high resolution numerical simulations (using the open-source code Basilisk) to investigate these complex dynamics, and uncover the physical processes involved.
Profile: Candidates should have a good training in Fluid Mechanics. The project can either be focused on experimental observations and/or numerical simulations depending on the applicant.
Environment: The project will take place in the laboratory of Prof. Marie-Jean THORAVAL at LadHyX in École Polytechnique, in the South of Paris.
Contact
Marie-Jean THORAVAL
08/10/2025
/
Thesis :
Funding :
32
Impact of compound drops: Bouncing or Sticky?
Domaines
Condensed matter
Biophysics
Soft matter
Physics of liquids
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
Impact of compound drops: Bouncing or Sticky? -
Context: The impact of a drop onto a solid or liquid surface has a wide range of applications including combustion, 3D printing, biological microarrays, pharmaceutics and the food industry. While most of them rely on single fluid drops, the emergence of new additive manufacturing techniques promises to revolutionize these industries by combining multiple fluids into compound drops. One of the critical challenges in these applications is to control the deposition process of the impacting drop and therefore its spreading, potential rebound and splashing.
Goals: We propose in this project to control the rebound of the water core by varying the viscosity and thickness of the outer oil layer. We will combine high-speed imaging experiments with high resolution numerical simulations (using the open-source code Basilisk) to investigate these complex dynamics, and uncover the physical processes involved in the deposition of compound drops.
Profile: Candidates should have a good training in Fluid Mechanics. The project can either be focused on experimental observations and/or numerical simulations depending on the applicant.
Environment: The project will take place in the laboratory of Professor Marie-Jean THORAVAL at LadHyX in École Polytechnique, in the South of Paris.
Contact
Marie-Jean THORAVAL
08/10/2025
/
Thesis :
Funding :
33
Air film dynamics
Domaines
Condensed matter
Biophysics
Soft matter
Physics of liquids
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Théorique, numérique Description
Air film dynamics -
Context: Gas transfer at the ocean surface has a critical importance for climate, as it captures around 30% of the CO2 released into the atmosphere, and for marine biological activity, as it provides the necessary O2. This transfer can be promoted by the entrapment of bubbles, produced through impacting rain drops or breaking waves. The shape and dynamics of the bubbles are important to model these transfers.
Goals: We propose in this project to study the contraction dynamics of an air film into a fluid. We will systematically vary the gas and fluid properties in different geometries to understand their contraction velocity and rupture mechanisms. This project will combine numerical simulations (using the open-source code Basilisk) with theoretical analysis to uncover the physical processes involved in the gas transfer into the ocean.
Profile: Candidates should have a good training in Fluid Mechanics and Computational Fluid Dynamics.
Environment: The project will take place in the laboratory of Prof. Marie-Jean THORAVAL at LadHyX in École Polytechnique, in the South of Paris.
Contact
Marie-Jean THORAVAL
08/10/2025
/
Thesis :
Funding :
34
Towards entanglement between relativistic electrons and photons mediated by plasmons
Domaines
Condensed matter
Quantum information theory and quantum technologies
Quantum optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Description
Quantum coherence, central to modern physics, underlies phenomena such as entanglement and Rabi oscillations, which lack classical analogues. This internship aims to explore a fundamental open question: can a relativistic free electron be entangled with a photon through its interaction with a plasmon? The project, which may evolve into a PhD thesis, combines experimental, instrumental, and theoretical efforts to reveal temporal correlations between ~100 keV electrons and photons mediated by surface plasmons. Using a scanning transmission electron microscope, a nanoscale electron probe will be positioned with nanometric precision on specially designed chiral plasmonic structures that emit circularly polarized photons at specific plasmonic resonances. Preliminary calculations indicate that in these conditions, each inelastic electron acquires a defined orbital angular momentum and becomes nearly perfectly entangled with a circularly polarized photon. The internship will focus on performing correlation measurements between electrons and photons to probe this entanglement, including tests of Bell inequality violations. These experiments will leverage a unique combination of advanced instrumentation, tailored nanostructures, and state-of-the-art detectors available in our group.
Contact
Mathieu Kociak
07/10/2025
/
Thesis :
Funding :
35
Coherent control of artificial atoms with relativistic electrons
Domaines
Condensed matter
Quantum information theory and quantum technologies
Quantum optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Description
Nano-optics explores optical phenomena occurring far below the diffraction limit of light. To overcome this limit, new concepts and techniques have emerged, among which the use of fast electrons—traveling at about half the speed of light—has proven uniquely powerful for probing the optical properties of nanomaterials. Our team has been a pioneer in this field, using electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL) to study a wide range of excitations in solids, from phonons to excitons, with unprecedented spatial and spectral resolution. More recently, we have developed energy-gain spectroscopy (EEGS), which combines the picometer-scale spatial precision of fast electrons with the sub-µeV spectral resolution of a laser. This innovation enables the investigation of quantum-optical systems such as ultra-high-finesse optical cavities. However, a key question remains open: can we coherently study and manipulate optical states in atomic or quasi-atomic systems such as quantum dots using relativistic electrons? The aim of this internship, potentially leading to a PhD, is to explore this new regime of coherent control of artificial atoms with electron beams. The project will take place on a unique platform coupling a monochromated transmission electron microscope with a laser system and custom-designed lithographic samples, opening unprecedented perspectives in quantum nano-optics.
Contact
Mathieu Kociak
07/10/2025
/
Thesis :
Funding :
36
Active droplets for cargo transport and micro-engines
Domaines
Statistical physics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
Emulsions are composed of at least two immiscible liquids, with the droplet interface stabilized by surfactants. In previous work we showed that when the droplet slowly dissolves into the continuous phase, self-sustained motion can occurs. More recently, we also demonstrated that as they shrink over their lifetime, single droplets interact with their own trail in a self-avoiding random walk. Yet, many questions remain: what are the collective behaviors of these active particles? What is the nature of inter-particle interactions? This internship explores active emulsion droplets as model systems of non-equilibrium soft matter. By combining experiments and theory, the project investigates how an active droplet can transport a passive one (cargo mode) or form a micro-rotor. The work involves microscopy, image analysis, and modeling to unravel the underlying dynamics and interactions. Beyond fundamental insight, the study aims to inspire microfluidic machinery and bio-inspired applications such as targeted delivery.
Contact
Adrien Izzet
07/10/2025
/
Thesis :
Funding :
37
Effect of viscoelasticity on mucus clearance in the pulmonary airways.
Domaines
Biophysics
Soft matter
Physics of liquids
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
This internship propose to investigate the dynamics of mucus clearance in the human airways, a process crucial for respiratory health and affected in diseases like cystic fibrosis. Mucus is cleared either by the coordinated beating of cilia or by cough-induced airflow, yet the role of its viscoelastic properties remains largely unexplored. As part of the CNRS-funded MUCUS project, you will study the behavior of liquid plugs formed during airway occlusion under different breathing scenarios.
You can choose between two complementary axes: numerical, using the Basilisk solver and supercomputer simulations to explore how viscoelasticity affects plug rupture in 2D and 3D geometries; or experimental, using microfluidic models to visualize plug dynamics and rupture under pressure gradients and cough-like flows. This hands-on internship combines fluid mechanics, advanced simulations, and cutting-edge experiments, offering the possibility to continue into a PhD. It’s a chance to tackle real-world biomedical challenges while gaining deep expertise in complex fluid dynamics and bio-inspired flows.
Contact
Charlotte De Blois
06/10/2025
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Thesis :
Funding :
38
Nanopore and Polymer Feedback in Flow
Domaines
Biophysics
Soft matter
Physics of liquids
Physics of living systems
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental Description
This internship propose to explore the hidden world of complex fluids at the single-molecule level. Traditional rheometers only reveal bulk properties, missing the microscopic details that truly govern how polymers move and interact—especially in biologically relevant environments such as mucus transport, where long mucin chains meet arrays of cilia. Using nanopore technology and fluorescence microscopy, you’ll directly visualize individual DNA molecules as they pass through nanometer-sized channels under controlled pressure. From these experiments, you’ll uncover key insights into polymer dynamics and fluid rheology by measuring translocation times, event frequencies, and critical pressures. You’ll be actively involved in setting up and calibrating the experimental system, preparing samples, and analyzing data in both Newtonian (water, water–glycerol) and non-Newtonian (DNA, PEO) fluids.
Contact
Charlotte De Blois
06/10/2025
/
Thesis :
Funding :
39
Towards neuromorphic applications with 2D ferroelectrics materials
Domaines
Condensed matter
Low dimension physics
Nouveaux états électroniques de la matière corrélée
Quantum information theory and quantum technologies
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental et théorique Description
The 2D+ Research Group at CRHEA, located on the French Riviera near Nice, France, is seeking a highly motivated and talented master candidate to join our cutting-edge research in nanophotonics with 2D materials. We offer a unique opportunity to explore emerging phenomena such as sliding ferroelectricity, ultra-low-threshold nonlinear photonics, and exciton engineering. The project is part of the European-funded 2DFERROPLEX consortium, bringing together leading experts in the field.
Contact
Antoine Reserbat-plantey
06/10/2025
/
Thesis :
Funding :
40
Physics of granular materials reinforced with fibres
Domaines
Soft matter
Type of internship
Expérimental Description
The internship explores the physics of granular materials reinforced with fibers, a system where the addition of a small fraction of flexible fibers can significantly enhance mechanical strength. While such reinforcement is widely used in engineering and observed in natural root-soil systems, the fundamental mechanisms behind fiber–grain interactions remain poorly understood. The project will involve controlled experiments with grains and synthetic fibers of varying aspect ratios and flexibilities, using setups such as vane rheometry, inclined-plane avalanches, and column collapse. The objective is to identify how parameters like fiber concentration, geometry, and flexibility affect flow behavior and mechanical response, and to contribute to the development of a physical framework and modeling approach that predicts the behavior of fiber-reinforced granular systems across different regimes.
Contact
Baptiste Darbois Texier
05/10/2025
/
Thesis :
Funding :
41
Locomotion in granular media
Domaines
Soft matter
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental Description
This internship investigates locomotion in granular media such as sand, a highly complex material that can exhibit both solid- and fluid-like behaviors. Drawing inspiration from animals like snakes, lizards, and clams, the project aims to experimentally analyze their movement strategies and quantify their efficiency in controlled environments. By designing and testing bio-inspired robotic models, the research seeks to identify the physical principles that govern interactions between moving bodies and granular substrates, contributing to a deeper understanding of granular mechanics and locomotion physics.
Contact
Baptiste Darbois Texier
05/10/2025
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Thesis :
Funding :
42
Physics models for the origins of Darwinian evolution
Domaines
Statistical physics
Biophysics
Soft matter
Nonequilibrium statistical physics
Physics of living systems
Non-equilibrium Statistical Physics
Type of internship
Théorique, numérique Description
Life is both the result of and the engine behind Darwinian evolution. In modern life forms, the underlying mechanisms of Darwinian evolution are complex and are also products of billions of years of evolution. At the origin of life, however, Darwinian evolution must have emerged from simpler processes. What could these processes be? We approach this question from a physics perspective by developing statistical physics models.
Our goal is to identify the fundamental physical and chemical processes that could give rise to Darwinian-like evolutionary dynamics and, more generally, life-like features, beyond the specific pathway that led to life on Earth.
Contact
Olivier Rivoire
03/10/2025
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Thesis :
Funding :
43
Quark Gluon Plasma equation of state
Domaines
High energy physics
Physics of liquids
Relativity/Astrophysics/Cosmology
Hydrodynamics/Turbulence/Fluid mechanics
Nuclear physics and Nuclear astrophysics
Type of internship
Expérimental et théorique Description
Le plasma quark-gluon (QGP) est un état exotique de la matière créé dans des conditions extrêmes au LHC du CERN. Il s'agit de l'un des premiers états de la matière après le Big Bang. Le stage consistera à étudier l'équation d'état du QGP à l'aide de simulations hydrodynamiques relativistes.
Contact
Michael Winn
02/10/2025
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Thesis :
Funding :
44
A flick to get in : Active transport through mimetic nanopores
Domaines
Statistical physics
Biophysics
Soft matter
Physics of liquids
Physics of living systems
Non-linear optics
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Biological nanopores are uncanny molecular machines that perform a wide variety of cellular functions, from sorting biomolecules to building cellular osmotic pressure and folding newly synthesised proteins. Their performance, as measured, for instance, by their energy efficiency, is unmatched by any other artificial system. Some biological nanopores as the nuclear pore complex induce the directionnal transport of macromolecules such as DNA, RNA and proteins.
In this internship/PhD project, our aim is to investigate directional transport using to two distincts scenario :
- Translocation ratchet : A molecular agent present downstream bind to the transported molecule and exert an effective translocation force on the species present upstream.
- Translocation induced by the enhanced mobility of enzymes in presence of their substrate.
The transport of single macromolecules will be measured by a near-field optical technique developed in the laboratory (Zero-Mode Waveguide for nanopores). Using a unique in France optical tweezers system coupled to a confocal microscope and a microfluidic system (Lumicks C-Trap) the forces involved in the transport will also be measured. From this measurement, we will extract the change in the translocation energy landscape in the presence of ratchet agents.
Contact
Fabien Montel
Laboratory : laboratoire de physique, ENS de Lyon - umr 5672
Team : ENS de Lyon, Physique
Team Website
Team : ENS de Lyon, Physique
Team Website
29/09/2025
/
Thesis :
Funding :
45
Optical sequencing of molecules for molecular data storage
Domaines
Statistical physics
Biophysics
Soft matter
Physics of liquids
Physics of living systems
Non-linear optics
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Molecular data storage relies on the ability to write and read digital information encoded onto large molecules. Recently, digital synthetic polymers have been introduced offering interesting perspectives for data storage due to a larger versatility and variety. However, sequencing of macromolecules, i.e. reading the digital information they contain, is a major challenge for molecular data storage. Nowadays, the main characterization techniques are based on mass spectrometry or electrical current detection. Despite their high sensitivity, these methods remain restricted to specific polymers and low level of parallelization.
Our transdisciplinary consortium of 3 laboratories (Ingénierie des Matériaux Polymères, Lyon; Laboratoire de Physique ENS de Lyon / CNRS ; Institut Fresnel, Marseille) aims to explore a novel approach involving the development of fluorescently encoded synthetic polymers and also DNA origamis, combined with an optical sequencing technique that enables faster reading of their controlled sequence. Our main goal is to set up an innovative platform based on the real-time optical sequencing of digital synthetic and natural polymers (Figure 1).
Contact
Fabien Montel
Laboratory : laboratoire de physique, ENS de Lyon - umr 5672
Team : ENS de Lyon, Physique
Team Website
Team : ENS de Lyon, Physique
Team Website
29/09/2025
/
Thesis :
Funding :
46
Protein droplets on a DNA wire : Optical tweezers to decipher biocondensate formation
Domaines
Statistical physics
Biophysics
Soft matter
Nonequilibrium statistical physics
Physics of living systems
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
Inside our cells, compartments also known as organelles enable to separate and regulate biomolecular processes : e.g. DNA replication in the nucleus or ATP production inside the mitochondria. Beyond these objects delimited by lipid bilayers it has been shown more recently that membrane-less structures known as biomolecular condensates can also segregate specific molecules. Such assemblies are formed by a demixing process called liquid-liquid phase separation (LLPS), in which molecular partners spontaneously enrich in a condensed phase usually forming droplets.
Here at the Physics Laboratory of ENS de Lyon / CNRS, we propose a single molecule approach using cutting-edge technology to manipulate DNA molecules together with a protein involved in DNA maintenance, DciA,. This protein from Deinococcus radiodurans, has been shown to form LLPS with DNA molecules and is postulated to be able to recruit other repair factors.
Using optical tweezers coupled with confocal microscopy and a microfluidic control, we will characterize the formation, the structure and the dynamics of these assemblies. Based on the ability of our system to exert and measure forces at the same time as they are visualized in fluorescence microscopy, our aim will be to understand the key molecular processes involved.
Contact
Fabien Montel
Laboratory : laboratoire de physique, ENS de Lyon - umr 5672
Team : ENS de Lyon, Physique
Team Website
Team : ENS de Lyon, Physique
Team Website
29/09/2025
/
Thesis :
Funding :
47
Superfluorescence of semiconductor quantum light nano-emitters
Domaines
Condensed matter
Quantum optics
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
The topic of the internship is to probe chains of semiconductor nanoplatelets by fluorescence microscopy and examine whether these structures exhibit superfluorescence, a mechanism by which incoherently excited dipoles, because of their coupling to the electromagnetic field, spontaneously develop a coherence and interfere constructively, leading to accelerated emission and original properties for emission correlations and directionality.
Contact
Laurent Coolen
29/09/2025
/
Thesis :
Funding :
48
Sedimentation of diatom chain colonies in complex flows
Domaines
Biophysics
Physics of liquids
Physics of living systems
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Théorique, numérique Description
Diatom chains are cohesive assemblies of unicellular microorganisms that are found in still and fresh
waters. Some species are passively transported by ambient currents and settle due to the weight of their dense
silica shells, while others have use various strategies to move or self-propel. One species in particular, called
Bacillaria Paxillifer, forms colonies of stacked rectangular cells that slide along each other while remaining
parallel. Their intriguing coordinated motion, leads to beautiful and nontrivial trajectories at the scale of the colony.
However, the effect of gravity and externat ambient flows on the dynamics of diatom chains must be investigated
to understand the behavior of plankton and marine snow aggregates as they sink, and capture CO2, to the ocean
depths.
Contact
Blaise Delmotte
26/09/2025
/
Thesis :
Funding :
49
Internship at University of Califonia, Santa Barbara
Domaines
Condensed matter
Statistical physics
Biophysics
Soft matter
Physics of liquids
Low dimension physics
Nonequilibrium statistical physics
Physics of living systems
Non-equilibrium Statistical Physics
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
We are looking for motivated students in Physics or Applied Math who are interested in soft matter and complex systems.
Our group combines Theory, table top Experiments, and numerical Simulation to Test ideas and gain insights into the evolution of patterns in in soft matter and fluids mechanics. Also, we use machine learning methods to learn the underlying physical laws of these complex systems.
Both theorists and experimentalists are welcome to apply to the group. Current topics of research include: pattern formation in active matter, statistical mechanics of filaments, instability in thin films, fluids-solids interaction, impact on soft interfaces.
Contact
Ousmane Kodio
26/09/2025
/
Thesis :
Funding :
50
Patterns generated by erosion by dissolution
Domaines
Soft matter
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
Erosion by dissolution plays a significant role in area covered by a soluble mineral like in Karst regions and is the cause of the formation of remarkable patterns (limestone pavements, scallops, dissolution channels, dissolution pinnacles, limestone forests…) with characteristic length scales. We propose in this internship, by the mean of controlled laboratory experiments, to study the morphogenesis of dissolution patterns. The soluble media and the hydrodynamic flows will be tuned to downscale the characteristic size and time of the involved processes from geological values to “laboratory” values. Thanks to quantitative measurements of the flow and of the topography of eroded surfaces, we will identify the driving elementary physical mechanisms and thus develop mathematical models and numerical simulations, with the aim to explain complex geological systems and to predict the long term evolution of landscapes.
In this internship, the student will develop in the group, one or several model experiments, reproducing dissolution erosion phenomena. To decrease the timescales, fast dissolving materials like salt and plaster will be used. Hydrodynamic properties of the flows will be characterized and the 3D shape evolution of eroded surfaces will be recorded.
Contact
Michael Berhanu
25/09/2025
/
Thesis :
Funding :
51
Chaotic graphs in silicon photonics
Domaines
Quantum optics/Atomic physics/Laser
Low dimension physics
Non-relativistic quantum field theory, quantum optics, complex quantum systems
Quantum information theory and quantum technologies
Quantum optics
Non-linear optics
Kinetic theory ; Diffusion ; Long-range interacting systems
Type of internship
Expérimental et théorique Description
Chaotic systems have a particular quantum behavior and several conjectures remain to be demonstrated concerning their spectrum and their wave functions [1]. Graphs can be chaotic or not and allow a relatively simple theoretical study of the classical and quantum limits [2]. These experiments are easier to carry out in photonics and the formalism fits well to the wave-particle duality of light. We have therefore produced graphs (chaotic or not) where light circulates in silicon waveguides (Fig. 1a) and we study their spectrum (Fig. 1c) and their wave functions (Fig. 1b).
The first objective is to verify the validity of the conjectures according to different types of graphs. In a second step, we will inject non-classical light (squeezed light or entangled photons for instance) to know if entanglement is sensitive to chaos.
The silicon graphs are fabricated in the C2N cleanroom. Their design requires numerical simulations performed under the supervision of Xavier Chécoury (C2N). The experiments are carried out on a dedicated characterization setup at C2N and the theory is developed in collaboration with Barbara Dietz (Dresden). The student may be involved in one or several of these tasks, depending on his/her preferences.
Contact
Mélanie Lebental
25/09/2025
/
Thesis :
Funding :
52
High-Sensitivity Microwave Spectroscopy for Precision Measurements and Tests of Fundamental Physics
Domaines
Quantum optics/Atomic physics/Laser
Metrology
Type of internship
Expérimental Description
The master’s student will join Laboratoire de Physique des Lasers (LPL) to develop a compact microwave (MW) spectrometer operating from 2–20 GHz. This instrument is designed both as a sensitive detector of internal quantum states in polyatomic molecules and as a precision tool for molecular frequency metrology. Proof-of-principle measurements have already shown free induction decay signals on the OCS J = 0 → 1 transition at 12.163 GHz with excellent signal-to-noise ratios. The next objective is sub-Hz accuracy, made possible by ultrastable, SI-traceable frequency references distributed by the REFIMEVE network.
Within the ANR Ultiμos project, the spectrometer will enable cross-checks between MW rotational frequencies and mid-infrared (MIR) rovibrational data measured at the 100 Hz level. These comparisons are motivated by the search for variations of the proton-to-electron mass ratio μ, a key constant of the Standard Model. Methanol and ammonia, with transitions highly sensitive to μ, are particularly powerful probes. MIR and MW results, obtained via independent experimental chains, will provide robust cross-validation of frequencies and uncertainty budgets.
The student will contribute to optimizing waveguide and cavity configurations, performing precision spectroscopy on benchmark species, developing MIR–MW double-resonance schemes to enhance sensitivity, and preparing integration with a cryogenic buffer-gas cooling source (~3 K).
Contact
Mathieu Manceau
Laboratory : Laboratoire de physique des lasers - UMR7538
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
24/09/2025
/
Thesis :
Funding :
53
Precision Measurements and tests of fundamental physics with cold molecules
Domaines
Quantum optics/Atomic physics/Laser
Metrology
Type of internship
Expérimental Description
The master’s student will contribute to the development of a new-generation molecular clock dedicated to precision vibrational spectroscopy of cold molecules in the gas phase. This cutting-edge platform combines cold molecule research and frequency metrology, enabling fundamental tests of physics beyond the Standard Model. A key first objective is the measurement of the tiny electroweak-induced energy difference between enantiomers of a chiral molecule—a direct signature of parity (left-right symmetry) violation and a sensitive probe of dark matter.
Molecules, with their rich internal structure, offer unique opportunities compared to atoms for precision measurements. They are increasingly used to test fundamental symmetries, measure fundamental constants and their possible time variations, and search for dark matter. Such experiments rely on ultra-precise determination of molecular transition frequencies, requiring advanced techniques familiar in atomic physics: selective state control, high detection efficiency, long coherence times, and cooling of internal and external degrees of freedom.
The student will play an active role in early developments of the experiment, including: setting up mid-infrared quantum cascade laser systems at 6.4 μm and 15.5 μm to probe molecular vibrations; and performing first Doppler and sub-Doppler absorption spectroscopy on cold molecules (~1 K) generated in a novel apparatus.
Contact
Mathieu Manceau
Laboratory : Laboratoire de physique des lasers - UMR7538
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
24/09/2025
/
Thesis :
Funding :
54
Looking for potential variations of the proton-to-electron mass ratio and other tests of fundamental physics via precision measurements with molecules
Domaines
Quantum optics/Atomic physics/Laser
Metrology
Type of internship
Expérimental Description
The master’s student will take part in forefront experiments dedicated to ultra-precise measurements of rovibrational molecular transitions to test a possible time variation of the proton-to-electron mass ratio (μ), a key constant of the Standard Model. Detecting such a drift would signal new physics and shed light on dark matter and dark energy. The approach relies on comparing astronomical molecular spectra with laboratory data. The experimental setup uses quantum cascade lasers (QCLs) stabilized to optical frequency combs traceable to primary standards, a technology pioneered at LPL that enables unprecedented precision in the mid-infrared.
The internship centers on methanol (CH₃OH), whose transitions are especially sensitive to μ-variation. The student will install and stabilize a QCL in the relevant spectral region, aiming for sub-Doppler resolution and ~100 Hz frequency accuracy, necessary for astrophysical comparisons. This work is part of the ANR Ultiμos project with LKB and MONARIS, combining spectroscopy of methanol and other species such as ammonia to identify key transitions for Earth- and space-based campaigns. Partners including Vrije Universiteit Amsterdam and Onsala Space Observatory provide theory and astronomical input.
Contact
Mathieu Manceau
Laboratory : Laboratoire de physique des lasers - UMR7538
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
Team : Métrologie, Molécules et Tests Fondamentaux
Team Website
24/09/2025
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Thesis :
Funding :
55
Multiscale computational investigation of PAR-seeded condensates in DNA damage response
Domaines
Biophysics
Type of internship
Théorique, numérique Description
This M2 project aims to understand the formation and structure of biomolecular condensates, which are crucial for DNA damage repair. Specifically, it will use multiscale simulations to investigate the interaction between PAR chains (nucleic acid scaffolds for these condensates) and the FUS protein, a key player in DNA repair. The project will be divided in two tasks: 1) Atomistic simulations with refined force fields to characterize PAR-FUS interactions in dilute solutions; 2) Coarse-grained simulations to explore the physical properties of PAR-FUS condensates under varying conditions. This internship should yield an improved molecular understanding of these crucial processes, with long term potential therapeutic impact as dysfunctional condensates are linked to diseases like cancer and neurodegenerative disorders
Contact
Elise Duboué-Dijon
24/09/2025
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Thesis :
Funding :
56
Machine-learning approaches to model interatomic interactions
Domaines
Condensed matter
Statistical physics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Théorique, numérique Description
Research overview
Materials can be studied using computer simulation which enables one to probe the motion of each constituent atoms and to build correlations between the macroscopic properties and the microscopic behaviors. On the one hand, traditional quantum mechanics methods provides particularly accurate results up to the electronic structure of the material. Yet, the drawback of this method concerns its computational cost which prevents from studying large system sizes and long time scales. On the other hand, effective potentials have been developed to mimic atomic interactions thereby reducing those issues. However, these potentials are often built to reproduce bulk properties of the materials and can hardly be employed to study some specific systems including interfaces and nanomaterials. In this context, a new class of interatomic potentials based on machine-learning algorithms is being developed to retain the accuracy of traditional quantum mechanics methods while being able to run simulations with larger system sizes and longer time scales.
Simulation project
Using computer simulations, the student will construct a database that should be representative of the different interactions occurring in a specific material. Machine-learning potentials based on the least-angle regression algorithm as well as neural network potentials will be trained and their accuracy will be studied as a function of the size and the complexity of the database.
Contact
Julien LAM
18/09/2025
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Thesis :
Funding :
57
Crystallization of nanomaterials: theory and simulation
Domaines
Condensed matter
Statistical physics
Soft matter
Physics of liquids
Nonequilibrium statistical physics
Non-equilibrium Statistical Physics
Kinetic theory ; Diffusion ; Long-range interacting systems
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Théorique, numérique Description
Research overview
The formation of a crystal is triggered by the emergence of a nucleation core. Classical nucleation theory (CNT) is widely employed to discuss its nature and its origin. In CNT, the thermodynamically stable phase is always the one that grows first and its size is then driven by the free energy competition between how much it costs to build a liquid-crystal interface and the gain from growing the crystal. Yet, following Ostwald’s rule, another structure may emerge beforehand if it is closer in free energy to the mother phase. Then, structural and also chemical reorganizations happen during the growth. This multi-stage nucleation mechanism already appears in bulk systems but can be amplified in nanocrystal nucleation where surface effects and chemical reactivity are enhanced. For nanoscience to be inspired by the practical applications instead of still being driven by the synthesis possibilities, it is crucial to reach a better understanding of the unique crystallization mechanisms leading to nanocrystals.
Simulation project
Atomistic simulations will be performed to study crystallization of binary particles. Examples will be taken from well-studied materials including CuZr, NiAl, NaCl, Water... We will investigate the correlation between the thermodynamic conditions and the final nanoparticles. The goal is to ultimately better understand how nucleation theory is affected by downsizing to the nanometric scale.
Contact
Julien LAM
18/09/2025
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Thesis :
Funding :
58
Physics of plants: Solving the mystery of embolism repair in plants after a period of drought
Domaines
Soft matter
Physics of liquids
Physics of living systems
Hydrodynamics/Turbulence/Fluid mechanics
Type of internship
Expérimental et théorique Description
It is not really understood how a plant can recover after the development of an air embolism after the nucleation of cavitation bubbles in their hydraulic network, some studies calling for a "miracle". An emerging hypothesis focuses on solutes (salts, sugars) to trigger the nucleation and growth of new droplets, which will refill the dry parts of the hydraulic circuit. The main objective of the internship is to understand the physics of the refilling when solutes are present. Our approach will be to manufacture biomimetic leaves made of a thin layer of transparent silicone.
Contact
Philippe Marmottant
16/09/2025
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Thesis :
Funding :
59
Bosons and fermions in van der Waals heterostructures
Domaines
Condensed matter
Nouveaux états électroniques de la matière corrélée
Nanophysics, nanophotonics, 2D materials and van der Waals heterostructures,, surface physicss, new electronic states of matter
Type of internship
Expérimental Description
The project focuses on mixtures of electrons (fermion) and excitons (electron-hole pair, a boson) in a new class of materials: van der Waals heterostructures. The latter can be seen as a “mille-feuille”, obtained by stacking atomically thin sheets of various materials. They recently became a prominent platform to study many-body physics, after a milestone discovery of superconductivity in bilayer graphene. Our long term ambition is to introduce superconductivity in a controlled manner, using excitons as force-carrier bosons (instead of phonons in conventional superconductors). The internship will pave the way toward this goal. It includes two steps, (i) the fabrication of the heterostructures and (ii) a first characterization with optical spectroscopy.
Contact
Bertrand Evrard
12/09/2025
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Thesis :
Funding :
60
Information flow and polymer physics of gene activity
Domaines
Statistical physics
Biophysics
Type of internship
Expérimental et théorique Description
Our project tackles the fundamental challenge of bridging the diverse temporal and spatial scales of biological development. From the nanoscale molecular interactions that occur in seconds to the formation of millimeter-to-meter-scale tissues over days, nature's complexity is staggering. This project seeks to unveil how information flows from molecular transcription factors to orchestrate tissue formation. This project employs a multidisciplinary approach, combining experimental techniques (quantitative microscopy) with theoretical modeling (polymer and statistical physics). It aims to decode the mechanisms governing the interplay between cellular regulation and tissue development. This research has broad implications for biophysics, developmental biology, and regenerative medicine.
Contact
Thomas Gregor
12/09/2025
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Thesis :
Funding :
61
SELF-ORGANIZED PATTERNING IN MAMMALIAN STEM-CELL AGGREGATES
Domaines
Statistical physics
Biophysics
Non-equilibrium Statistical Physics
Type of internship
Expérimental et théorique Description
This research project aims to uncover the biophysical principles that enable mammalian embryonic stem cells to self-organize into synthetic organoid structures reminiscent of mouse embryos. Our approach blends mathematical modeling with precise single-cell
measurements to investigate the emergence of positional and correlative information within differentiating stem-cell aggregates. By integrating theoretical predictions with experimental data, the project will compare dynamic information flow across various
developmental systems, such as fly embryos and stem-cell-derived organoids. This interdisciplinary effort not only bridges quantitative and life sciences but also offers students a collaborative environment where they can take ownership of their research and help define the project’s direction.
Contact
Thomas Gregor
12/09/2025
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Thesis :
Funding :
62
FISH SCHOOLS AS SOFT ACTIVE MATTER
Domaines
Statistical physics
Soft matter
Physics of living systems
Type of internship
Expérimental et théorique Description
Can the motion of animal collectives be described as the flows of soft active matter? To answer this question, we combine field studies of massive fish schools, extensive data analysis, machine learning, and mathematical modelling. Depending on your interests and the scope of your internship, you will contribute to a selection of these efforts. Reach out to learn more about our research!
Contact
Denis Bartolo
12/09/2025
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Thesis :
Funding :