Magnetic skyrmions are nanoscale spin textures whose collective dynamics may exhibit quantum effects. In frustrated magnets, their helicity, the angle describing the orientation of the in-plane spins, can behave as a quantum degree of freedom. Discrete energy levels and tunnelling between helicity configurations have motivated proposals for skyrmion qubits. How can these quantum properties be detected? This theoretical internship will explore this question using a nitrogen-vacancy (NV) centre in diamond as a local spin sensor. Fluctuations of the skyrmion's magnetic field modify the sensor's relaxation time, providing access to the spectrum of helicity fluctuations. The student will combine analytical calculations with numerical simulations to calculate helicity energy levels, transition matrix elements and the resulting NV relaxation rate. We will investigate how temperature, magnetic field, and sensor geometry affect the signal, and assess which features could distinguish quantum dynamics from classical thermal fluctuations. The project offers training in quantum magnetism, quantum sensing, and open quantum systems. Knowledge of quantum mechanics and basic programming skills are expected.