%0 Journal Article
%T Entanglement and disentanglement in the nonlinear interaction between squeezing vacuum state field and atom<br>压缩真空场与原子非线性作用过程中的纠缠与消纠缠
%A Huang Yan-Xi
%A Zhao Peng-Yi
%A Huang Xi
%A Zhan Ming-Sheng
%A <br>黄燕霞
%A 赵朋义
%A 黄熙
%A 詹明生
%J 物理学报
%D 2004
%I 
%X The properties of the entanglement in the intensity-dependent coupling interaction between squeezing vacuum state field and atom with an additional Kerr medium are investigated by using the von Neumann entropy. The influences of nonlinear interaction intensity of Kerr medium and the squeezing degree of initial squeezing vacuum state field on the entanglement of the quantum system are discussed. The results show that the nonlinear interaction of Kerr medium can result in the generation of the maximally entangled state, disentangled-free state or disentangled state, and the degree of entanglement is stationary.
%K squeezing vacuum state
%K Kerr medium
%K intensity-dependen coupling J-C model
%K von Neumann entrop
%K quantum entanglement<br>压缩真空态，
%K 克尔介质，
%K 依赖强度耦合J-C模型，
%K Von
%K Neumann熵，
%K 量子纠缠
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=41520EFEE0825185&yid=D0E58B75BFD8E51C&vid=8E6AB9C3EBAAE921&iid=CA4FD0336C81A37A&sid=80A07035DF96B0C4&eid=35FC3610259C2B32&journal_id=1000-3290&journal_name=物理学报&referenced_num=12&reference_num=22