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Bell态原子与双模纠缠相干光场相互作用的场熵演化特性
引用本文:邹艳. Bell态原子与双模纠缠相干光场相互作用的场熵演化特性[J]. 原子与分子物理学报, 2009, 26(1): 138-144
作者姓名:邹艳
作者单位:山东省德州学院物理系
基金项目:德州学院科研计划项目(项目编号:07024)资助课题
摘    要:运用全量子理论研究了初始处于Bell态(对称迭加态或反对称态)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:原子初态处于反对称态时,场熵始终为零;原子初态处在对称迭加态时,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.

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

Entropy properties in the system of atoms in Bell states interacting with the two-mode entangled coherent field
Zou Yan. Entropy properties in the system of atoms in Bell states interacting with the two-mode entangled coherent field[J]. Journal of Atomic and Molecular Physics, 2009, 26(1): 138-144
Authors:Zou Yan
Abstract:The field entropy time evolution in Bell states (the symmetry superposition state and the antisymmetric superposition state) 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 in the antisymmetric superposition state. For the state the symmetry superposition state, 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.
Keywords:quantum optics   Bell states   two-mode entangled coherent field   quantum entanglement   field entropy evolution
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