摘要
研究了三个全同二能级原子与单模腔相互作用系统中原子间的三体纠缠特性.考虑原子间存在相互耦合,并且腔场处于弱相干态的情况,通过数值计算给出了纠缠量的演化曲线,讨论了原子间耦合强度和弱相干场强度对三体纠缠的影响.研究结果表明:随弱相干场强度增强,原子间的三体纠缠增强;相反,随原子间耦合系数增大,原子间三体纠缠减弱.
In this paper we consider the case that three identical two-level atoms are trapped in a single-mode cavity which is in a weak coherent state initially, and there is an interaction between two atoms. The tripartite entanglement dynamics among atoms is studied. The influences of atom-atom coupling constant and intensity of the cavity field on the tripartite entanglement among atoms are discussed. The results obtained using the numerical method show that the tripartite entanglement among atoms is strengthened with the increase of intensity of the cavity field; on the other hand, it is weakened with the increase of the coupling constant between atoms.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第6期40-45,共6页
Acta Physica Sinica
基金
福建省自然科学基金(批准号:2011J01018)资助的课题~~
关键词
量子光学
弱相干态
腔量子电动力学
三体纠缠
quantum optics
weak coherent state
cavity quantum electrodynamics
tripartite entangle-ment