V型三能级原子与双模奇偶纠缠相干光场相互作用的场熵演化特性  

Entropy properties in the system of a V type three-level atom interacting with the two-mode odd-even entangled coherent field

作　　者：邹艳[1] 李永平[1] 

机构地区：[1]德州学院物理系

出　　处：《量子电子学报》2008年第5期582-587,共6页Chinese Journal of Quantum Electronics

摘　　要：运用量子约化熵研究了V型三能级原子与双模奇偶纠缠相干光场相互作用系统中场熵的演化特性。分析了光场的失谐量、平均光子数、原子的初态及光场纠缠度对场熵的影响。结果表明:增大失谐量或光场强度,场熵都能呈现出崩塌-回复现象,并且回复的周期也逐渐增大,而失谐量增大,场熵的平均值减小,光场增强,场熵的平均值增大;原子初态处于激发态或叠加态比基态的场熵平均值大;增大双模光场间的纠缠度,场熵的平均值和振幅都有所减小。The quantum reduced entropy evolution of a V-type three-level atom interacting with the two- mode odd-even entangled coherent field is investigated. The effects of the detuning, mean photon numbers of field, the atom＇s initial state and the degree of the entanglement of the two-mode odd-even entangled coherent fields on the entropy are discussed. The results show that the oscillation of the entropy presents collapses and revivals with the increasing of the detuning or the mean photon number. The mean-value of field entropy decreases with the increasing of the detuning. But it increases with the increasing of the mean photon number. The mean-values of field entropy are higher when the atom is initially in excited state or superposition state than that of in ground state. The mean-value and the amplitude of field entropy decrease with the increasing of the degree of the entanglement of the two-mode odd-even entangled coherent fields .

关 键 词：量子光学 V型三能级原子 双模奇偶纠缠相干光场 量子约化熵 量子纠缠 

分 类 号：O431.2[机械工程—光学工程]