中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4375-4377.doi: 10.1088/1674-1056/17/12/007
满忠晓, 夏云杰
Man Zhong-Xiao (满忠晓), Xia Yun-Jie (夏云杰)
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.
中图分类号: (Entanglement and quantum nonlocality)