Concentration of Unknown Atomic Entangled States via Entanglement Swapping through Raman Interaction  

作　　者：邹金华 胡响明 

机构地区：[1]Department of Physics, Huazhong Normal University, Wuhan 430079

出　　处：《Chinese Physics Letters》2008年第9期3142-3145,共4页中国物理快报（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos 10574052 and 60778005.

摘　　要：We show that entanglement concentration of unknown atomic entangled states is achieved via the implementation of entanglement swapping based on Raman interaction in cavity QED. A maximally entangled state is obtained from a pair of partially entangled states probabilistically. Due to Raman interaction of two atoms with a cavity mode and an external driving field, the influence of atomic spontaneous emission has been eliminated. Because of the virtual excitation of the cavity mode, the decoherence of cavity decay and thermal field is neglected.We show that entanglement concentration of unknown atomic entangled states is achieved via the implementation of entanglement swapping based on Raman interaction in cavity QED. A maximally entangled state is obtained from a pair of partially entangled states probabilistically. Due to Raman interaction of two atoms with a cavity mode and an external driving field, the influence of atomic spontaneous emission has been eliminated. Because of the virtual excitation of the cavity mode, the decoherence of cavity decay and thermal field is neglected.

关 键 词：the power-law exponents PRECIPITATION durative abrupt precipitation change 

分 类 号：O413.2[理学—理论物理]