Bell态原子与双模纠缠相干光场相互作用的场熵演化特性  

Entropy properties in the system of atoms in Bell states interacting with the two-mode entangled coherent field

作　　者：邹艳[1,2] 

机构地区：[1]德州学院物理系,德州253023 [2]山东省高校生物物理重点实验室,德州253023

出　　处：《原子与分子物理学报》2009年第1期138-144,共7页Journal of Atomic and Molecular Physics

基　　金：德州学院科研基金(07024)

摘　　要：运用全量子理论研究了初始处于Bell态β_)或β_)的两原子与双模纠缠相干光场相互作用系统中场熵的演化特性.分析了光场强度、光场纠缠度及原子间相互作用强度对场熵演化特性的影响.结果表明:原子初态处于β_(11)>时,场熵始终为零;原子初态处在β_(01))时,增大光场强度场熵的时间演化曲线逐渐变成较规则的振荡曲线,原子间的相互作用强度对双原子间纠缠度有显著的非线性调制作用.The field entropy time evolution in Bell state|β_(01)> and |β_(11)> interacting with the two-mode entangled coherent field is investigated by means of full quantum theory. The effects of the atoms initial state,mean photon numbers of field,the degree of the entanglement for the entangled coherent fields,and the coupling strength of interaction between atoms on the entropy evolution properties of the field are discussed. The results shows that the entropy will forever be zero when the initial state is |β_(11) >. For the state |β(01)> the oscillation of the field entropy presents periodicity with the increasing of the mean photon number. And the coupling strength of interaction between atoms plays a major role in the entropy evolution properties.

关 键 词：量子光学 BELL态 双模纠缠相干光场 量子纠缠 场熵演化 

分 类 号：O431.2[机械工程—光学工程]