Restoring broken entanglement by separable correlations

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DatePublished - 3 Sep 2015
Original languageEnglish

Abstract

We consider two bosonic Gaussian channels whose thermal noise is strong enough to break bipartite entanglement. In this scenario, we show how the presence of separable correlations between the two channels is able to restore the broken entanglement. This reactivation occurs not only in a scheme of direct distribution, where a third party (Charlie) broadcasts entangled states to remote parties (Alice and Bob), but also in a configuration of indirect distribution which is based on entanglement swapping. In both schemes, the amount of entanglement remotely activated can be large enough to be distilled by one-way distillation protocols.

Bibliographical note

SPIE Optics + Optoelectronics 2015, Quantum Optics and Quantum Information Transfer and Processing, Prague, Czech Republic (15-16/4/2015).

    Research areas

  • quant-ph

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