%0 Journal Article
%T On entanglement invariant for a double Jaynes-Cummings model<br>
%A Man Zhong-Xiao
%A Xia Yun-Jie
%A <br>
%J 中国物理 B
%D 2008
%I 
%X 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.
%K entanglement dynamics
%K entanglement invariant<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=B567C64720E932A800AF8E796122EF0F&yid=67289AFF6305E306&vid=BCA2697F357F2001&iid=59906B3B2830C2C5&sid=AA20449ACF11C44F&eid=334CF99EEB84D0A2&journal_id=1009-1963&journal_name=中国物理&referenced_num=1&reference_num=0