Robust scheme for implemention of quantum phase gates for two atoms  

作　　者：郑仕标 

机构地区：[1]Department of Physics,Fuzhou University

出　　处：《Chinese Physics B》2009年第8期3453-3456,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 10674025);the Doctoral Foundation of the Ministry of Education of China (Grant No 20070386002)

摘　　要：We propose a scheme for implementing conditional quantum phase gates for two four-state atoms trapped in a cavity. The two ground states of the atoms are coupled through two Raman processes induced by the cavity mode and two classical fields. Under certain conditions nonresonant Raman processes lead to two-atom coupling and can be used to produce conditional phase gates. The scheme is insensitive to cavity decay, thermal photons, and atomic spontaneous emission. The scheme does not require individual addressing of the atoms.We propose a scheme for implementing conditional quantum phase gates for two four-state atoms trapped in a cavity. The two ground states of the atoms are coupled through two Raman processes induced by the cavity mode and two classical fields. Under certain conditions nonresonant Raman processes lead to two-atom coupling and can be used to produce conditional phase gates. The scheme is insensitive to cavity decay, thermal photons, and atomic spontaneous emission. The scheme does not require individual addressing of the atoms.

关 键 词：quantum phase gates Raman process two-atom coupling 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]