## Displacement-enhanced entanglement distillation of single-mode-squeezed entangled states |

Optics Express, Vol. 21, Issue 6, pp. 6670-6680 (2013)

http://dx.doi.org/10.1364/OE.21.006670

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### Abstract

It has been shown that entanglement distillation of Gaussian entangled states by means of local photon subtraction can be improved by local Gaussian transformations. Here we show that a similar effect can be expected for the distillation of an asymmetric Gaussian entangled state that is produced by a single squeezed beam. We show that for low initial entanglement, our largely simplified protocol generates more entanglement than previous proposed protocols. Furthermore, we show that the distillation scheme also works efficiently on decohered entangled states as well as with a practical photon subtraction setup.

© 2013 OSA

**OCIS Codes**

(000.6800) General : Theoretical physics

(270.5290) Quantum optics : Photon statistics

(270.6570) Quantum optics : Squeezed states

(270.5585) Quantum optics : Quantum information and processing

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: January 2, 2013

Revised Manuscript: March 1, 2013

Manuscript Accepted: March 2, 2013

Published: March 11, 2013

**Citation**

Anders Tipsmark, Jonas S. Neergaard-Nielsen, and Ulrik L. Andersen, "Displacement-enhanced entanglement distillation of single-mode-squeezed entangled states," Opt. Express **21**, 6670-6680 (2013)

http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-6-6670

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