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arXiv · 1504.07577

Entanglement replication via quantum repeated interactions

Pierre Wendenbaum·Thierry Platini·Dragi Karevski
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Abstract

We study entanglement creation between two independent XX chains, which are repeatedly coupled locally to spin-1/2 Bell pairs. We show analytically that in the steady state the entanglement of the Bell pairs is perfectly transferred to the chains, generating large-scale interchain pair correlations. However, before the steady state is reached, within a growing causal region around the interacting locus the chains are found in a current driven nonquilibrium steady state (NESS). In the NESS, the chains cross entanglement decays exponentially with respect to the distance to the boundary sites with a typical length scale which is inversely proportional to the driving current.

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Pierre Wendenbaum, Thierry Platini, Dragi Karevski. 2015-04-28. Entanglement replication via quantum repeated interactions. https://doi.org/10.1103/physreva.91.040303

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