中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4375-4377.doi: 10.1088/1674-1056/17/12/007

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On entanglement invariant for a double Jaynes-Cummings model

满忠晓, 夏云杰   

  1. College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
  • 收稿日期:2008-03-25 修回日期:2008-04-22 出版日期:2008-12-20 发布日期:2008-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10774088).

On entanglement invariant for a double Jaynes-Cummings model

Man Zhong-Xiao (满忠晓), Xia Yun-Jie (夏云杰)   

  1. College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
  • Received:2008-03-25 Revised:2008-04-22 Online:2008-12-20 Published:2008-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10774088).

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摘要： In a recent paper [Phys. Rev. A 76 042313 (2007)], Sainz and Bjork introduced an entanglement invariant $\mathcal{E}$ under evolution for a system of four qubits interacting through two isolated Jaynes-Cummings Hamiltonians. This paper proves that this entanglement invariant $\mathcal{E}$ is closely connected with the linear entropy between two independent subsystems.

关键词: entanglement dynamics, entanglement invariant

Abstract: In a recent paper [Phys. Rev. A 76 042313 (2007)], Sainz and Bjork introduced an entanglement invariant $\mathcal{E}$ under evolution for a system of four qubits interacting through two isolated Jaynes-Cummings Hamiltonians. This paper proves that this entanglement invariant $\mathcal{E}$ is closely connected with the linear entropy between two independent subsystems.

Key words: entanglement dynamics, entanglement invariant

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Lx (Quantum computation architectures and implementations) 03.67.Mn (Entanglement measures, witnesses, and other characterizations) 42.50.Dv (Quantum state engineering and measurements)