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Chin. Phys. B, 2008, Vol. 17(12): 4375-4377    DOI: 10.1088/1674-1056/17/12/007
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On entanglement invariant for a double Jaynes-Cummings model

Man Zhong-Xiao, Xia Yun-Jie
College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
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.
Keywords:  entanglement dynamics      entanglement invariant     
Received:  25 March 2008      Published:  20 December 2008
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  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)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10774088).

Cite this article: 

Man Zhong-Xiao, Xia Yun-Jie On entanglement invariant for a double Jaynes-Cummings model 2008 Chin. Phys. B 17 4375

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