原子-腔光力学系统中原子熵压缩的研究  

Study on Entropy Squeezing of the Atom in an Atom-Cavity-Optomechanical System

作　　者：廖庆洪[1] 郑庆华[1] 鄢秋荣[1] 刘晔[1] 张旗[1] 

机构地区：[1]南昌大学电子信息工程系,江西南昌330031

出　　处：《中国激光》2016年第2期260-267,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(11247213;61368002;11304010;11264030;61168001);中国博士后科学基金(2013M531558);江西省博士后科研择优资助项目(2013KY33);江西省自然科学基金(20142BAB217001);江西省青年科学家(井冈之星)培养对象计划项目(20122BCB23002);江西省教育厅科技项目(GJJ13051;GJJ13057)

摘　　要：运用信息熵压缩理论研究了原子-腔光力学系统中两能级原子的信息熵压缩,讨论了原子相干角、腔场与机械模之间的耦合系数和原子两能级相对位相对原子熵压缩的影响。结果表明通过选择适当的原子相干角、腔场与机械模之间的耦合系数以及原子两能级间的相对位相,可以分别控制原子信息熵压缩的压缩幅度、压缩频率和压缩方向;并且通过调节原子相干角可以制备原子最佳熵压缩态,理论上提供了一种调控原子-腔光力学系统中原子熵压缩的方式。Using the theory of information entropy squeezing, the entropy squeezing of a two-level atom in an atom- cavity-optomechanical system is investigated. The influences of the coherent angles of the atom, the coupling coefficient between the cavity field and the mechanical mode, and the relative phase of the two atom level on the entropy squeezing of the atom are discussed. It is shown that the squeezing amplitude, squeezing frequency and squeezing direction of the atomic information entropy squeezing can be controlled by choosing the suitable coherent angle of the atom, coupling coefficient between the cavity field and the mechanical mode and the relative phase of the two atom level, respectively; and the atomic optimal entropy squeezing states in the system can be prepared by controlling the coherence angle of the atom. The proposal may provide a theoretical way to control entropy squeezing of the atom in the atom-cavity-optomechanical system.

关 键 词：量子光学 熵压缩 两能级原子 最佳熵压缩态 

分 类 号：O431.2[机械工程—光学工程]