纠缠双原子对场熵压缩特性的影响  

Influence of Entangled-Atoms Pair on Squeezing of Field Entropy

作　　者：周明[1] 方家元[1] 孔凡志[1] 黄春佳[1] 

机构地区：[1]长沙理工大学物理与电子科学学院光电子学研究所,长沙410076

出　　处：《光学学报》2007年第2期340-343,共4页Acta Optica Sinica

摘　　要：研究了相干态光场与纠缠双原子相互作用系统中场熵的压缩性质,借助于数值计算,讨论了双原子纠缠度及光场强度对场熵压缩的影响。所得结果表明,双原子初态的纠缠度对压缩的持续时间和压缩深度具有决定性的影响。当双原子初始时刻处于最大纠缠态时,场熵具有较大的压缩深度和较长的压缩时间。初始光场强度对场熵的压缩深度和压缩时间也具有显著的影响。光场愈弱,场熵的压缩性愈好。The entropy squeezing properties of the coherent field interacting with a pair of entangled atoms are studied by means of quantum theory. With the numerical method, the influence of two-atom＇s entanglement and field intensity on the field entropy squeezing properties is discussed. The results show that the initial entanglement of atoms and initial intensity of field as well affect intensively both time and depth of field entropy squeezing. The greater depth and longer time of field entropy squeezing appear when the pair of atoms are initially in the maximally entangled state. The weaker the field is, the better the entropy squeezing of field is.

关 键 词：量子光学 纠缠双原子 相干态光场 场熵压缩 

分 类 号：O431.2[机械工程—光学工程]