Random generation with the spin of a qutrit
We consider the use of a single qutrit for random generation. This is possible because single qutrits exhibit contextuality features. We aim to optimize the entropy of the generated sequence. To do this, we do not rely on the KCBS inequality but instead on the use of a specific state and a check for fidelity. By the way, we show that this check can be considered as a variant of the CHSH inequality applied to pairs of photons or spin-1/2 particles (qutrits are often realized as a pair of indistinguishable qubits). The physical realisation of this random generator should be eased by the fact it needs only to implement spin operations and measurement, not general $\SU(3)$ qutrit manipulations.