两原子依次通过粒子场的纠缠突然死亡与突然产生  

Sudden Death and Sudden Birth of Entanglement Between Two Atoms Successively Passing Fock State Field

作　　者：张宝来[1] 高德营[1] 

机构地区：[1]聊城大学东昌学院,山东聊城252000

出　　处：《河北师范大学学报（自然科学版）》2011年第5期469-472,478,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(10774088);聊城大学东昌学院科研项目

摘　　要：通过数值计算的方法,研究了两纠缠二能级原子依次通过粒子场时的纠缠演化特性,发现原子的初态和光场的初态对两原子的纠缠有影响.当光场的粒子数为0时,纠缠处于周期性变化;当粒子数不为0时,纠缠非周期性变化,并出现纠缠突然死亡与突然产生现象.通过改变原子的初态和光场的初态,纠缠突然死亡和产生现象会随之改变.The dynamics of entanglement of two initially separate atoms passing through a cavity one after another is studied by the negativity method.The effects of the two atom initial states and the field in the fock state on the time evolution of atom-atom entanglement are examined.The phenomenon of sudden birth and death of entanglement occurs when the photon number in the fock state is not zero and the phenomenon will change with the two atom initial states and the photon number.

关 键 词：纠缠 粒子场 NEGATIVITY 

分 类 号：O431[机械工程—光学工程]