Detection of nonlocal spin entanglement by light emission from a superconducting p-n junction

Article

关键词: HIDDEN-VARIABLE THEORIES;    NOISE CROSS-CORRELATION;    QUANTUM DOTS;    BELLS-INEQUALITY;    ELECTRONS;    SYSTEM;    SUPERCURRENT;    PHOTONS;    DEVICES;    PAIRS;   

DOI  :  10.1103/PhysRevB.92.054514

来源: SCIE

【 摘 要 】

We model a superconducting p-n junction in which the n and the p sides are contacted through two optical quantum dots (QDs), each embedded into a photonic nanocavity. Whenever a Cooper pair is transferred from the n side to the p side, two photons are emitted. When the two electrons of a Cooper pair are transported through different QDs, polarization-entangled photons are created, provided that the Cooper pairs retain their spin singlet character while being spatially separated on the two QDs. We show that a Clauser-Holt-Shimony-Horne (CHSH) Bell-type measurement is able to detect the entanglement of the photons over a broad range of microscopic parameters, even in the presence of parasitic processes and imperfections.

【 授权许可】

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