多光子Tavis-Cummings模型中两纠缠原子的纠缠演化特性被引量：28

The entanglement character of two entangled atoms in multiphoton Tavis-Cummings model

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摘要研究了两个纠缠的二能级原子通过多光子跃迁与单模相干光场进行耦合相互作用系统中两原子纠缠的演化特性.计算分析表明,两个原子之间的纠缠呈现出周期性的演化特性,初始两原子的状态、原子间的偶极相互作用、相干光场的参数以及跃迁光子数对两个原子的纠缠有着显著的影响;并发现两原子初始处于某最大纠缠态时,两原子会永远处于该最大纠缠态,因此这一类最大纠缠态可以作为一种量子信息存储器. We investigated the entanglement time evolution of two entangled two-level atoms. The two atoms can undergo muhiphoton transition when they interact resonantly with a single-mode field in the coherent state. The results show that the two-atom entangled state evolves periodicity. The influence of the two-atom initial state, the dipole-dipole coupling intensity between two atoms, the parameter of the coherent state and the number of the transitional photons on the entanglement degree of two atoms are revealed. When the initial state is a maximum entangled state, the state of the two entangled atoms will forever stay in this maximum entangled state. So this kind of entanglement state can be used for quantum information storage.

作者张英杰周原夏云杰

机构地区曲阜师范大学物理工程学院

出处《物理学报》 SCIE EI CAS CSCD 北大核心 2008年第1期21-27,共7页 Acta Physica Sinica

基金国家自然科学基金重点项目(批准号10534030)资助的课题~~

关键词量子纠缠部分转置矩阵负本征值纠缠原子相干态 quantum entanglement, negative eigenvalues of the partial transposition, entangled atoms, coherent state

分类号 O431.2 [机械工程—光学工程]

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