摘要
利用共生纠缠度,讨论了囚禁于单模腔场中二能级原子系统的纠缠度变化规律.在环境温度为绝对零度时,原子与腔场只在共振(Δ=0)或非共振但|Δ|=2g条件下,系统才有可能达到最大纠缠态;系统存在上限温度Tc=1.134 gk,与失谐量Δ无关.当环境温度T>Tc时,系统完全消相干;当环境温度T<Tc时,系统纠缠度随环境温度的增加而减少.
Atomic-cavity entanglement in time evolution and thermal entanglement by means of concurrence are investigated for two-level atom system in cavity.The result shows that the atom-cavity maximal entangled state appears at the T=0,if it is Δ=0 or Δ=2g.There exists a critical temperature T_c=1.134gk,which is independent of a detuning frequency Δ.The thermal entanglement vanishes at the T>T_c.and it decreases with the increasing of temperature at the T<T_c.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第6期64-67,共4页
Journal of Southwest China Normal University(Natural Science Edition)
基金
福建省教育厅科技计划资助项目(JA04259)
闽江学院资助项目
关键词
原子与腔场纠缠
失谐频率
热纠缠态
共生纠缠度
atom-cavity entanglement
detuning frequency
thermal entanglement
concurrence
