Abstract
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 postselected version of the protocol, which relaxes the demanding requirements with respect to the source efficiency.
Original language | English |
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Article number | 012222 |
Journal | Physical Review A |
Volume | 106 |
Issue number | 1 |
Number of pages | 16 |
ISSN | 2469-9926 |
DOIs | |
Publication status | Published - 28 Jul 2022 |
Keywords
- KEY DISTRIBUTION