Detection of Nonlocal Spin Entanglement by Light Emission from a Superconducting p-n Junction

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 pai...

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Published in:arXiv.org 2014-12
Main Authors: Schroer, Alexander, Recher, Patrik
Format: Article
Language:English
Subjects:
Cooper pairs
Entanglement
Light emission
P-n junctions
Photonics
Photons
Quantum dots
Quantum theory
Superconductivity
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description 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 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.
doi_str_mv 10.48550/arxiv.1412.8619
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subjects Cooper pairs
Entanglement
Light emission
P-n junctions
Photonics
Photons
Quantum dots
Quantum theory
Superconductivity
title Detection of Nonlocal Spin Entanglement by Light Emission from a Superconducting p-n Junction
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