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Violation of Bell's inequality with quantum-dot single-photon sources

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arxiv 2109.14712 v2 pith:UB6DVFLS submitted 2021-09-29 quant-ph

Violation of Bell's inequality with quantum-dot single-photon sources

classification quant-ph
keywords single-photonsourcesrequirementsbelldeterministicefficiencyexperimentalinequality
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the possibility of realizing a loophole-free violation of Bell's inequality using deterministic single-photon sources. We provide a detailed analysis of a scheme to achieve such violations over long distances with immediate extensions to device-independent quantum key distribution. We investigate the effect of key experimental imperfections that are unavoidable in real-world single-photon sources including the finite degree of photon indistinguishability, single-photon purity, and the overall source efficiency. We benchmark the performance requirements to state-of-the-art deterministic single-photon sources based on quantum dots in photonic nanostructures and find that experimental realizations appear to be within reach. We also evaluate the requirements for a post-selected version of the protocol, which relaxes the demanding requirements with respect to the source efficiency.

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