偶偶相互作用和光子数对两原子间纠缠演化的影响  

The Influence of Dipole-dipole Interaction and Photon Number on the Entanglement Evolution between Two Atoms

作　　者：闫丽 YAN Li(Department of Physics and Electronic Engineering of Heze University,Heze 274015,China)

机构地区：[1]菏泽学院物理与电子工程学院,山东菏泽274015

出　　处：《量子光学学报》2022年第4期283-287,共5页Journal of Quantum Optics

基　　金：菏泽学院校级科研项目(XY18KJ10);山东省高校科研项目(J18KA224)。

摘　　要：本文研究了由两个不同能级的原子与一个单模光场相互作用的系统,在一原子处于基态而另一原子处于激发态的初始条件下,得到系统态矢的演化。原子间的纠缠利用部分转置负本征值来研究,并且分别讨论了偶偶相互作用和光子数对两原子间纠缠演化的影响。结果表明增加原子间的偶偶相互作用和减小光子数可使原子间的纠缠增强,另外偶偶相互作用和光子数的增加均可使原子间的演化周期缩短,这一研究有助于找到提升原子间纠缠的方法。In this paper,we studied the evolution of a system of two atoms of different energy levels interacting with a single-mode optical field,with one atom in the ground state and the other in the excited state.Entanglement between atoms was studied using partial transposition of negative eigenvalues and the effects of the dyadic interaction and the photon number on the evolution of the entanglement between the two atoms were discussed separately.The results show that increasing the coupling interactions and decreasing the photon number can lead to increased interatomic entanglement,and that increasing both coupling interactions and photon number can lead to shorter interatomic evolution periods.This study will help to find ways to enhance interatomic entanglement.

关 键 词：量子光学 量子纠缠 三能级原子 偶偶相互作用 

分 类 号：O413.2[理学—理论物理]