The entanglement evolution of two coupling two-level atoms interacting with a single-mode vacuum field in multiphoton Tavis-Cummings model  

作　　者：Lu Daoming 

机构地区：[1]Department of Electronic Engineering, Wuyi University, Wuyishan, Fujian 354300, China

出　　处：《Engineering Sciences》2012年第1期80-85,共6页中国工程科学（英文版）

基　　金：Supported by the Natural Science Foundation of Fujian Province under Grant (No.2008J0217)

摘　　要：Using multipohton Tavis-Cummings model,the entanglement evolution of two coupling two-level atoms in Bell states interacting with a single-mode vacuum field is investigated by using negativity.The influences of coupling constants between atoms,the atomic initial states and the photon number of transition on the entanglement evolution of two coupling two-level atoms are discussed.The results obtained using the numerical method show that the entanglement of two atoms is related with coupling constants between atoms,the atomic initial states and the photon number of transition.The two-atom entanglement state will forever stay in the maximum entanglement state when the initial state is β11〉.When the initial state of two atoms is β01〉,the entanglement of two atoms displays periodic oscillation behavior.And its oscillation period decreases with increasing of coupling constant between atoms or the photon number of transition.On the other hand,when the initial state is β00〉 or β10〉,the entanglement of two atoms displays quasiperiodic oscillation behavior and its oscillation period decreases with increasing of coupling constant between atoms or the photon number of transition.

关 键 词：quantum optics single-mode vacuum field two coupling two-level atoms muhiphoton ENTANGLEMENT 

分 类 号：O431.2[机械工程—光学工程] O413.1[理学—光学]