Intrinsic Decoherence of a Two-Atom System with Dipole-Dipole Interaction  

作　　者：齐琳娜 朱爱东 张寿 

机构地区：[1]Department of Physics, College of Science, Yanbian University, Yanji 133002

出　　处：《Chinese Physics Letters》2008年第4期1183-1186,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 60667001.

摘　　要：We investigate the effect of dipole-dipole interaction on the intrinsic decoherence of a system which consists of two two-level atoms and an optical cavity. The entanglement of the system is calculated by making use of concurrence. Our results show that the appropriate choice for the coupling constant Ω of dipole-dipole interaction can restrain the intrinsic deeoherenee of the system. We also find a special phenomenon. No matter what the value of γ is, the concurrence of system slowly increases and cannot exceed 0.71 when Ω= 1.We investigate the effect of dipole-dipole interaction on the intrinsic decoherence of a system which consists of two two-level atoms and an optical cavity. The entanglement of the system is calculated by making use of concurrence. Our results show that the appropriate choice for the coupling constant Ω of dipole-dipole interaction can restrain the intrinsic deeoherenee of the system. We also find a special phenomenon. No matter what the value of γ is, the concurrence of system slowly increases and cannot exceed 0.71 when Ω= 1.

关 键 词：JAYNES-CUMMINGS MODEL TRAPPED ION 2 ATOMS ENTANGLEMENT CAVITY WAVE 

分 类 号：O45[理学—无线电物理]