dorsal/arxiv
View SchemaDistillation of continuous-variable entanglement with optical means
| Authors | J. Eisert, D. E. Browne, S. Scheel, M. B. Plenio |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307106 |
| URL | https://arxiv.org/abs/quant-ph/0307106 |
| DOI | 10.1016/j.aop.2003.12.008 |
| Journal | Annals of Physics (NY) 311, 431 (2004) |
Abstract
We present an event-ready procedure that is capable of distilling Gaussian two-mode entangled states from a supply of weakly entangled states that have become mixed in a decoherence process. This procedure relies on passive optical elements and photon detectors distinguishing the presence and the absence of photons, but does not make use of photon counters. We identify fixed points of the iteration map, and discuss in detail its convergence properties. Necessary and sufficient criteria for the convergence to two-mode Gaussian states are presented. On the basis of various examples we discuss the performance of the procedure as far as the increase of the degree of entanglement and two-mode squeezing is concerned. Finally, we consider imperfect operations and outline the robustness of the scheme under non-unit detection efficiencies of the detectors. This analysis implies that the proposed protocol can be implemented with currently available technology and detector efficiencies.
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"abstract": "We present an event-ready procedure that is capable of distilling Gaussian\ntwo-mode entangled states from a supply of weakly entangled states that have\nbecome mixed in a decoherence process. This procedure relies on passive optical\nelements and photon detectors distinguishing the presence and the absence of\nphotons, but does not make use of photon counters. We identify fixed points of\nthe iteration map, and discuss in detail its convergence properties. Necessary\nand sufficient criteria for the convergence to two-mode Gaussian states are\npresented. On the basis of various examples we discuss the performance of the\nprocedure as far as the increase of the degree of entanglement and two-mode\nsqueezing is concerned. Finally, we consider imperfect operations and outline\nthe robustness of the scheme under non-unit detection efficiencies of the\ndetectors. This analysis implies that the proposed protocol can be implemented\nwith currently available technology and detector efficiencies.",
"arxiv_id": "quant-ph/0307106",
"authors": [
"J. Eisert",
"D. E. Browne",
"S. Scheel",
"M. B. Plenio"
],
"categories": [
"quant-ph"
],
"doi": "10.1016/j.aop.2003.12.008",
"journal_ref": "Annals of Physics (NY) 311, 431 (2004)",
"title": "Distillation of continuous-variable entanglement with optical means",
"url": "https://arxiv.org/abs/quant-ph/0307106"
},
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