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  • Received: Apr. 5, 2007

    Accepted: --

    Posted: Aug. 8, 2007

    Published Online: Aug. 8, 2007

    The Author Email: Jun Qian (jqian@mail.siom.ac.cn)

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    Jun Qian, Xunli Feng, Shangqing Gong. Entanglement dynamics of non-interacting two-qubit system under a squeezed vacuum environment[J]. Chinese Optics Letters, 2007, 5(8): 484

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Chinese Optics Letters, Vol. 5, Issue 8, 484 (2007)

Entanglement dynamics of non-interacting two-qubit system under a squeezed vacuum environment

Jun Qian1,2,*, Xunli Feng1,2, and Shangqing Gong1,3

Author Affiliations

  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
  • 2Graduate School of the Chinese Academy of Sciences, Beijing 100039
  • 3Department of Physics, Blk S12, National University of Singapore, 2 Science Drive 3, Singapore 117542

Abstract

Entanglement dynamics of two non-interacting atoms in a squeezed vacuum reservoir is studied. Several examples with different initial entangled states are investigated, and it is found that entangled atoms become disentangled faster in squeezed vacuum than in ordinary vacuum, and larger squeezing results in faster entanglement decay. The time evolution of the concurrence and the separability "distance" 'Lambda' can be used to explain this novel entanglement sudden death phenomenon.

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