中国物理B ›› 2011, Vol. 20 ›› Issue (3): 30301-030301.doi: 10.1088/1674-1056/20/3/030301

• GENERAL • 上一篇    下一篇

Influence of selective atomic measurement on the entanglement properties of a two-atom outside cavity

卢道明   

  1. Department of Electronic Engineering, Wuyi University, Wuyishan 354300, China
  • 收稿日期:2010-04-20 修回日期:2010-05-15 出版日期:2011-03-15 发布日期:2011-03-15
  • 基金资助:
    Project supported by the Natural Science Foundation of Fujian Province, China (Grant No. 2008J0217).

Influence of selective atomic measurement on the entanglement properties of a two-atom outside cavity

Lu Dao-Ming(卢道明)†   

  1. Department of Electronic Engineering, Wuyi University, Wuyishan 354300, China
  • Received:2010-04-20 Revised:2010-05-15 Online:2011-03-15 Published:2011-03-15
  • Supported by:
    Project supported by the Natural Science Foundation of Fujian Province, China (Grant No. 2008J0217).

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摘要： Considering three two-level atoms initially in the W or Greenberger--Horne--Zeilinger (GHZ) state, one of the three atoms is put into an initially coherent light cavity and made to resonantly interact with the cavity. The two-atom entanglement evolution outside the cavity is investigated. The influences of state-selective measurement of the atom inside the cavity and strength of the light field on the two-atom entanglement evolution outside the cavity are discussed. The results obtained from the numerical method show that the two-atom entanglement outside the cavity is strengthened through state-selective measurement of the atom inside the cavity. In addition, the strength of the light field also influences the two-atom entanglement properties.

Abstract: Considering three two-level atoms initially in the W or Greenberger–Horne–Zeilinger (GHZ) state, one of the three atoms is put into an initially coherent light cavity and made to resonantly interact with the cavity. The two-atom entanglement evolution outside the cavity is investigated. The influences of state-selective measurement of the atom inside the cavity and strength of the light field on the two-atom entanglement evolution outside the cavity are discussed. The results obtained from the numerical method show that the two-atom entanglement outside the cavity is strengthened through state-selective measurement of the atom inside the cavity. In addition, the strength of the light field also influences the two-atom entanglement properties.

Key words: quantum optics, two-level atom, selective atomic measurement, entanglement

中图分类号: 

  • 03.65Ud
42.50.Dv (Quantum state engineering and measurements)