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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 4 — Apr. 1, 2014
  • pp: 810–815

Local squeezing-assisted two-copy and single-copy continuous variable entanglement distillation

ShengLi Zhang, ChenHui Jin, JianSheng Guo, JianHong Shi, WanSu Bao, XuBo Zou, and GuangCan Guo  »View Author Affiliations


JOSA B, Vol. 31, Issue 4, pp. 810-815 (2014)
http://dx.doi.org/10.1364/JOSAB.31.000810


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Abstract

Entanglement distillation is a physically feasible operation which helps to partially or completely eliminate noise-induced decoherence in the distribution of entangled states. In this paper, we investigate the two-copy and single-copy distillation of an amplitude-damped continuous variable two-mode squeezed vacuum state. We consider local squeezing as one of the important tools [Phys. Rev. A 84, 062309 (2011)] to enhance distillation. Our result is twofold. First, we show that local squeezing is useful to improve the distillation of two-copy interference-based distillation. Second, we show single-copy photon subtraction-based distillation is more efficient in providing more entangled outputs. However, such an advantage would diminish and two-copy distillation could succeed with much higher probability of success for a fixed amount of distilled entanglement.

© 2014 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: January 23, 2014
Revised Manuscript: February 12, 2014
Manuscript Accepted: February 13, 2014
Published: March 17, 2014

Citation
ShengLi Zhang, ChenHui Jin, JianSheng Guo, JianHong Shi, WanSu Bao, XuBo Zou, and GuangCan Guo, "Local squeezing-assisted two-copy and single-copy continuous variable entanglement distillation," J. Opt. Soc. Am. B 31, 810-815 (2014)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-4-810

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