T-C模型中虚光子过程对光场压缩效应的影响  

Influences of the virtual photon process on the squeezing effects of a single-mode light field in the T-C model

作　　者：万琳[1] 刘素梅[1] 刘三秋[1] 

机构地区：[1]江西师范大学物理与通信电子学院,南昌330027

出　　处：《物理学报》2002年第1期84-90,共7页Acta Physica Sinica

摘　　要：利用全量子理论 ,研究非旋波近似下T C模型中受激场的压缩效应 .结果表明 :非旋波近似下 ,由于虚光场的影响 ,Q的演化曲线出现了“小锯齿状” ,表现为系统的量子噪声 ,随着ω和 n的增大 ,量子噪声分别减小和增大 ,虚光子过程使光场的压缩程度明显加深 ;研究结果还揭示了原子 场耦合系数λ及原子间耦合系数g与光场压缩效应的关系 .In this paper, the squeezing effects of a light field in the T-C model is studied by means of the quantum theory in the Counter-Rotating-Wave-Approximation (C-RWA). It has been shown that: the little indentation which represents the quantum noise of the system appears in the evolution curves of Q under the C-RWA; the quantum noise which is caused by virtual photon field gradually becomes weak when omega increases; the quantum noise increases when n increases; the virtual photon process can strengthen the squeezing effect obviously. Besides, the dependence of the atom-field coupling constant lambda and the atom-atom coupling constant g on the squeezing effects of the field is observed in our results.

关 键 词：T-C模型 非旋波近似 压缩效应 量子噪声 虚光子过程 光场 量子光学 

分 类 号：O431.2[机械工程—光学工程]