非旋波近似下压缩真空场与三能级原子依赖强度耦合系统的光场压缩  

Light squeezing in the system of squeezed vacuum field interacting with the V-type three-level atom via intensity-dependent coupling without rotating wave approximation

作　　者：李秀凤[1] 黄春佳[1] 周明[1] 

机构地区：[1]长沙理工大学物理与电子科学学院,长沙410077

出　　处：《原子与分子物理学报》2007年第4期817-822,共6页Journal of Atomic and Molecular Physics

基　　金：湖南省教育厅基金(06C096)

摘　　要：利用全量子理论,研究了非旋波近似下压缩真空场与V型三能级原子依赖强度耦合相互作用系统中光场的压缩效应.数值计算结果表明:光场呈现出周期性压缩现象,而虚光子过程则对光场的压缩具有抑制作用并产生量子噪声,量子噪声大小依赖于光场的初始压缩因子r和光场频率ω,且与原子-光场耦合强度g有关.随着r的增大,虚光子过程对光场压缩抑制作用程度由弱到强再由强到弱;随着ω和g的增大,量子噪声分别减小和增大.The time evolution of light squeezing in the system of squeezed vacuum field interacting with V-type three-level atom via intensity-dependent coupling is studied by means of the quantum theory without rotating wave approximation. The result obtained by means of numerical method indicate that the light field＇is periodically squeezed, Moreover, the squeezing of light field is restrained and the quantum chaos caused by the virtual-photon process depend on the initial state parameters of the system： r, ω and g, When r increases, the inhibition of squeezing of light field by the virtual-photon process becomes stronger and then weaker. When ω and g increase, the quantum chaos gradually become weak or strong respectively.

关 键 词：非旋波近似 光场的压缩 压缩真空场 V型三能级原子 

分 类 号：O431.2[机械工程—光学工程]