中国物理B ›› 2007, Vol. 16 ›› Issue (7): 1878-1882.doi: 10.1088/1009-1963/16/7/012

• GENERAL • 上一篇    下一篇

Dynamics of the entanglement witness for three qubits in common environment

逯怀新   

  1. Department of Physics, Weifang University, Weifang 261061, China; Department of Physics, Qufu Normal University, Qufu 273165, China
  • 收稿日期:2006-11-08 修回日期:2006-12-11 出版日期:2007-07-04 发布日期:2007-07-04
  • 基金资助:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant No Y2006 A05).

Dynamics of the entanglement witness for three qubits in common environment

Lu Huai-Xin(逯怀新)†   

  1. Department of Physics, Weifang University, Weifang 261061, China; Department of Physics, Qufu Normal University, Qufu 273165, China
  • Received:2006-11-08 Revised:2006-12-11 Online:2007-07-04 Published:2007-07-04
  • Supported by:
    Project supported by the Natural Science Foundation of Shandong Province, China (Grant No Y2006 A05).

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摘要： In the measurement-based model of quantum computing, a one-way quantum computer consisting of many qubits can be immersed in a common environment as a simple decoherence mechanism. This paper studies the dynamics of entanglement witness for 3-qubit cluster states in the common environment. The result shows that environment can induce an interesting feature in the time evolution of the entanglement witness: i.e., the periodical collapse and revival of the entanglement dynamics.

Abstract: In the measurement-based model of quantum computing, a one-way quantum computer consisting of many qubits can be immersed in a common environment as a simple decoherence mechanism. This paper studies the dynamics of entanglement witness for 3-qubit cluster states in the common environment. The result shows that environment can induce an interesting feature in the time evolution of the entanglement witness: i.e., the periodical collapse and revival of the entanglement dynamics.

Key words: cluster states, entanglement witness, entanglement dynamics

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
03.65.Ud (Entanglement and quantum nonlocality) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)