两纠缠二能级原子与单模光场相互作用的纠缠动力学过程研究  

Dynamics of Entanglement of Two Entangled Two-Level Atoms Interacted with Single-Mode Field

作　　者：孙晓梅 刘巧 刘有志 张延亮 Xiaomei Sun;Qiao Liu;Youzhi Liu;Yanliang Zhang(College of Software, Jishou University, Zhangjiajie Hunan)

机构地区：[1]吉首大学,软件学院,湖南张家界

出　　处：《现代物理》2017年第6期235-241,共7页Modern Physics

基　　金：吉首大学大学生研究性学习和创新性实验计划支持项目。

摘　　要：在光原子相互作用系统中,考虑两二能级原子间的偶极–偶极相互作用对原子间纠缠动力学过程的影响。研究表明:原子间的偶极–偶极相互作用对量子纠缠(共生纠缠度)动力学振荡过程具有抑制作用,当偶极–偶极相互为零时,量子纠缠呈双周期振荡效果,当偶极–偶极相互作用增强时,振荡频率逐渐降低,当偶极–偶极相互作用远大于原子与库环境相互作用强度时,量子纠缠呈明显的余弦振荡,其振荡频率为2πΩ/ ( √6g) . 。The influence of dipole-dipole interactions between the two two-level entangled atoms for dynamics of quantum entanglement is studied in the system of matter-field interaction in quantum optics. The results show that the dipole-dipole interaction is capable to suppress dynamics of quantum entanglement (concurrence). If we have no regard for the dipole-dipole interaction, the dynamic of quantum entanglement is periodic oscillation including two different frequencies. Meanwhile, the frequency is decreasing with the increasing of the dipole-dipole interaction. When this interaction is much larger than that between the atoms and independent the single-mode field (modeled as extern environment), the process of dynamic of quantum entanglement is cosine oscillation with frequency 2πΩ/ ( √6g) ..

关 键 词：量子纠缠动力学 纠缠二能级原子 偶极–偶极相互作用 

分 类 号：O43[机械工程—光学工程]