Efficient Scheme for Macroscopic Superpositions and Entanglement of High-Order Squeezed Vacuum States in Cavity QED  

作　　者：CHEN Chang-Yong 

机构地区：[1]Department of Physics and Information Engineering, Hunan Institute of Humanities, Science and Technology, Loudi417000, China

出　　处：《Communications in Theoretical Physics》2008年第5期1187-1190,共4页理论物理通讯（英文版）

基　　金：The project supported by National Natural Science Foundation of China under Grant Nos.10774042,10474118 and 1047200;the Science Research Fund of Hunan Institute of Humanity and Science and Technology under Grant No.2005A008

摘　　要：We propose an etticient scheme for generating the macroscopic superpositions and the entanglement between the high-order squeezed vacuum states by considering the multi-photon interaction of N two-level atoms in a cavity with high quality factor, assisted by a strong driving field. Through specific choices of the cavity detuning, a number of multi-party entangled states between the atoms and the high-order squeezed vacuum states and among the high-order squeezed vacuum states of the cavities can be prepared, including also the macroscopic ＂Schrodinger cats＂ of the high- order squeezed vacuum states, the entangled states of the macroscopic ＂Schrodinger cats＂, and so on. Possible extension and application of our scheme are discussed. Our scheme is reachable within the current techniques in the cavity QED.

关 键 词：multiparty entanglement cavity QED multi-photon interaction 

分 类 号：O43[机械工程—光学工程]