## Roles of thermal noise and detector efficiency in distillation of continuous variable entanglement state |

JOSA B, Vol. 30, Issue 10, pp. 2704-2709 (2013)

http://dx.doi.org/10.1364/JOSAB.30.002704

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### Abstract

We address the degradation of continuous variable (CV) entanglement distillation in the presence of thermal environment and nonunity detecting efficiency. We explore the logarithmic negativity as a criteria and compare the output entanglement between the schemes of single-photon subtraction (PS) and two-PS. The probability of success is also investigated. We show that compared with detector efficiency, thermal noise plays a more dominant role in Gaussian entanglement distillation. Our results shed more light on the noise mechanism that influences realistic CV entanglement distillation and is of experimental relevance in developing a more efficient entanglement distillation scheme.

© 2013 Optical Society of America

**OCIS Codes**

(270.0270) Quantum optics : Quantum optics

(270.5290) Quantum optics : Photon statistics

(270.6570) Quantum optics : Squeezed states

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: June 6, 2013

Manuscript Accepted: August 26, 2013

Published: September 25, 2013

**Citation**

ShengLi Zhang, YuLi Dong, JianHong Shi, XuBo Zou, and GuangCan Guo, "Roles of thermal noise and detector efficiency in distillation of continuous variable entanglement state," J. Opt. Soc. Am. B **30**, 2704-2709 (2013)

http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-10-2704

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