Generation of quantum-certified random numbers using on-chip path-entangled single photons from an LED

Single-photon entanglement is a peculiar type of in which two or more degrees freedom single photon are correlated quantum-mechanically. Here, we demonstrate photonic integrated chip able to generate and manipulate single-photon path-entangled states, using commercial red LED as light source. A Bell test, the Clauser, Horne, Shimony, Holt (CHSH) form, performed confirm presence entanglement, resulting maximum value CHSH correlation parameter equal 2.605±0.004. This allows us use it an semi-device independent quantum random number generator produce certified numbers. The certification scheme based on Bell’s inequality violation partial characterization experimental setup, without need introducing any further assumptions either input state particular form measurement observables. In end min-entropy 33% demonstrated.