振幅衰减模型中弱相干光场的退相干  

Decoherence of Weak Coherent State Under Amplitude Damping

作　　者：李锐奇[1] 卢道明[1] 

机构地区：[1]武夷学院机电工程学院,福建武夷山354300

出　　处：《量子光学学报》2014年第1期23-29,共7页Journal of Quantum Optics

基　　金：福建省自然科学基金(2011J01018)

摘　　要：利用热纠缠态表象求解密度矩阵主方程的方法,给出了任意时刻振幅衰减模型中弱相干场密度算符的表示式。采用数值计算方法计算了弱相干光场的压缩效应、统计性质和Wigner函数。讨论了耗散对这些量子特性的影响。研究结果表明:随衰减时间的增大,弱相干场的压缩效应、统计性质和Wigner函数的负性等非经典效应均减弱。Master equations of density operators can be concisely solved by virtue of thermo-entangled state representation .We got the evolution formula of the field density operator which was in weak coherent state initially .Its squeezing effect ,statistical property ,and Wigner function were investigated .The effect of decoherence on nonclassical property was discussed .Numerical results showed that its nonclassical property was weakened as the dissipation a time increased .

关 键 词：振幅衰减模型 弱相干场 退相干 

分 类 号：O431.2[机械工程—光学工程]