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Open Quantum Systems Decoherence Entanglement Theory Quantum Correlations

Bell nonlocality in the turbulent atmosphere

arXiv

Authors: M. O. Gumberidze, A. A. Semenov, D. Vasylyev, W. Vogel

Year

2016

Paper ID

7727

Status

Preprint

Abstract Read

~2 min

Abstract Words

108

Citations

N/A

Abstract

Violations of Bell inequalities are better preserved by turbulent atmospheric channels than by comparable optical fibers in the scenario of copropagating entangled photons [A.A. Semenov and W. Vogel, Phys. Rev. A 81, 023835 (2010); arXiv:0909.2492]. Here we reexamine this result for the case of counterpropagation also considering the fact that each receiver registers so-called double-click events, which are caused by dark counts, stray light, and multi-photon entangled pairs. We show that advantages of the atmospheric links are feasible only for the copropagation scenario in the case of strong fluctuations of losses. For counterpropagation, the violations of Bell inequalities can be improved with an additional postselection procedure testing the channel transmittance.

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Violations of Bell inequalities are better preserved by turbulent atmospheric channels than by comparable optical fibers in the scenario of copropagating entangled photons [A.A.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1608.08243 [2] arXiv https://arxiv.org/abs/1608.08243 [3] Publisher https://arxiv.org/abs/1608.08243

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