吉首大学学报：自然科学版
吉首大學學報：自然科學版
길수대학학보：자연과학판
Journal of Jishou University(Natural Science Edition)
2011年
4期
50-54
,共5页
双光子Tavies—Cummings模型%量子相干%共生纠缠度%自发辐射系数%腔场的损耗
雙光子Tavies—Cummings模型%量子相榦%共生糾纏度%自髮輻射繫數%腔場的損耗
쌍광자Tavies—Cummings모형%양자상간%공생규전도%자발복사계수%강장적손모
two-photon Tavies-Cummings model%atomic coherence%concurrence%spontaneous emission coefficient%cavity decay
用共生纠缠度度量的方法来研究两原子在耗散和非耗散腔场中的量子纠缠．研究结果表明：通过控制相互作用时间能够制备出最大纠缠态；且由于原子的双光子跃迁，导致双光子Tavies—Cummings模型是单光子Tavies—Cummings模型在制备最大纠缠态上所需要的时间的．且原子的自发辐射和腔场的损耗使得两原子的最大相干随时间呈周期性减小．
用共生糾纏度度量的方法來研究兩原子在耗散和非耗散腔場中的量子糾纏．研究結果錶明：通過控製相互作用時間能夠製備齣最大糾纏態；且由于原子的雙光子躍遷，導緻雙光子Tavies—Cummings模型是單光子Tavies—Cummings模型在製備最大糾纏態上所需要的時間的．且原子的自髮輻射和腔場的損耗使得兩原子的最大相榦隨時間呈週期性減小．
용공생규전도도량적방법래연구량원자재모산화비모산강장중적양자규전．연구결과표명：통과공제상호작용시간능구제비출최대규전태；차유우원자적쌍광자약천，도치쌍광자Tavies—Cummings모형시단광자Tavies—Cummings모형재제비최대규전태상소수요적시간적．차원자적자발복사화강장적손모사득량원자적최대상간수시간정주기성감소．
This paper investigates quantum entanglement of two atoms in the non-dissipative and dissipative cases by means of concurrence.The results indicate that maximum entanglement condition can be prepared by controlling the interacting time and due to the two-photon transition of atoms,the time required to prepare the maximum entanglement in two-photon Tavies-Cummings model is of that in single-photon Tavies-Cummings model.In addition,the atomic spontaneous emission and cavity decay make the maximum coherence of two atoms decrease periodically.
