陆续通过一个双模腔的两原子之间纠缠的突然产生和调控  

Sudden birth and control of entanglement between two atoms successively passing through a bimodal cavity

作　　者：廖庆洪[1] 刘晔[1] 

机构地区：[1]南昌大学电子信息工程系,南昌330031

出　　处：《物理学报》2012年第15期17-22,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10647133);江西省自然科学基金(批准号:2009GQS0080);江西省教育厅科技项目(批准号:GJJ11339;GJJ12137)资助的课题~~

摘　　要：通过计算并发度研究了陆续通过一个双模腔的两个原子之间的纠缠动力学特性,讨论了第一个原子的相干性以及腔场初始纠缠度对两原子之间纠缠的影响.结果表明系统在一定条件下可以出现两原子之间纠缠突然产生现象,两原子之间产生纠缠的最大值依赖于双模腔场初始纠缠度;并且可以通过改变原子的振幅来控制产生纠缠的阈值时间和纠缠的最大值,理论上提供了一种调控纠缠的方式.The dynamics of entanglement of two atoms passing through a bimodal cavity one after another are investigated by employing the concurrence.The effects of the atomic coherence of the first atom and the initial entanglement of the cavity field on the time evolution of atom-atom entanglement are analyzed.The results show that the phenomenon of sudden birth of entanglement between two atoms occurs under some conditions and the maximum for the creation of the entanglement is dependent on the initial entanglement of the cavity field.Moreover,the threshold time and maximum for the creation of the entanglement can be controlled by changing the amplitude of atom.We find that the proposal may provide us with a theoretical way to control and manipulate the entanglement.

关 键 词：量子纠缠 纠缠产生 纠缠调控 

分 类 号：O431.2[机械工程—光学工程]