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arxiv 2303.15332 v1 pith:NBEKZNMT submitted 2023-03-27 quant-ph

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

classification quant-ph
keywords entanglementrandomablebellchshformintegratednumbers
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Single-photon entanglement is a peculiar type of entanglement in which two or more degrees of freedom of a single photon are correlated quantum-mechanically. Here, we demonstrate a photonic integrated chip (PIC) able to generate and manipulate single-photon path-entangled states, using a commercial red LED as light source. A Bell test, in the Clauser, Horne, Shimony and Holt (CHSH) form, is performed to confirm the presence of entanglement, resulting in a maximum value of the CHSH correlation parameter equal to $2.605 \pm 0.004$. This allows us to use it as an integrated semi-device independent quantum random number generator able to produce certified random numbers. The certification scheme is based on a Bell's inequality violation and on a partial characterization of the experimental setup, without the need of introducing any further assumptions either on the input state or on the particular form of the measurement observables. In the end a min-entropy of $33\%$ is demonstrated.

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