中国物理B ›› 2008, Vol. 17 ›› Issue (8): 2969-2972.doi: 10.1088/1674-1056/17/8/034

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Purification of entangled states for two atoms via cavity decay

郑仕标   

  1. Department of Electronic Science and Applied Physics Fuzhou University, Fuzhou 350002, China
  • 收稿日期:2007-10-29 修回日期:2007-12-18 出版日期:2008-08-20 发布日期:2008-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10674025) and funds from Fuzhou University.

Purification of entangled states for two atoms via cavity decay

Zheng Shi-Biao(郑仕标)†   

  1. Department of Electronic Science and Applied Physics Fuzhou University, Fuzhou 350002, China
  • Received:2007-10-29 Revised:2007-12-18 Online:2008-08-20 Published:2008-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10674025) and funds from Fuzhou University.

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摘要： In this paper a scheme is proposed for the purification of entangled states for two atoms trapped in two distant cavities via cavity decay. In the scheme, the atoms have no probability of being populated in the excited state and thus the atomic spontaneous emission is suppressed. This scheme is valid no matter when the cavity decay rate is larger or smaller than the effective atom-cavity coupling strength. The fidelity of the final state is not affected by the imperfection of the photodetectors.

Abstract: In this paper a scheme is proposed for the purification of entangled states for two atoms trapped in two distant cavities via cavity decay. In the scheme, the atoms have no probability of being populated in the excited state and thus the atomic spontaneous emission is suppressed. This scheme is valid no matter when the cavity decay rate is larger or smaller than the effective atom-cavity coupling strength. The fidelity of the final state is not affected by the imperfection of the photodetectors.

Key words: purification, entangled state, cavity decay

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Pq (Cavity quantum electrodynamics; micromasers)