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级联原子诱导的腔光力系统的稳态纠缠特性
引用本文:肖瑞杰,刘野,李丹,修晓明.级联原子诱导的腔光力系统的稳态纠缠特性[J].锦州师范学院学报(自然科学版),2014(2):114-118.
作者姓名:肖瑞杰  刘野  李丹  修晓明
作者单位:[1]渤海大学数理学院,辽宁锦州121013 [2]锦州师范高等专科学校机械电子工程学,辽宁锦州121000 [3]成都工业学院电气与电子工程系,四川成都611730
基金项目:国家自然科学基金(No:11305016).
摘    要:本文提出了一个由三能级级联原子束去纠缠双模腔场的理论方案。利用量子朗之万方程,结合激光的线性近似理论,求出此系统的稳态解。同时,采用Negativity作为纠缠判据,对系统的稳态纠缠进行了数值模拟。研究结果表明,纠缠是由原子的相干态诱导的,即使对于机械品质因子较低的坏腔,当参数取值恰当时,两模腔场以及腔场与镜子之间也都会产生纠缠。并且得出,入射率越大,纠缠越大。

关 键 词:腔光力系统  哈密顿  朗之万方程  稳态纠缠

The stable entanglement properties of cavity optomechanical system induced by cascade atoms
XIAO Rui-jie,LIU Ye,LI Dan,XIU Xiao-ming.The stable entanglement properties of cavity optomechanical system induced by cascade atoms[J].Journal of Jinzhou Normal College (Natural Science Edition),2014(2):114-118.
Authors:XIAO Rui-jie  LIU Ye  LI Dan  XIU Xiao-ming
Institution:1. College of Mathematics and Physics, Bohai University, Jinzhou 121013, China; 2. Department of Mechanical and Electronic Engineering,Jinzhou Teachers Training College,Jinzhou 121000, China; 3. Department of Electrical and Electronic Engineering, Chengdu Technological University, Chengdu 611730, China )
Abstract:The paper proposes a theory scheme for the three -level cascade atoms coupled to two -mode cavities.Employing the quantum Langevin equation and the linear approximation theory , the steady state of the hybrid system was obtained .Meanwhile , the stable entanglement of optomechanical system was numerically sim-ulated by employing the logarithmic negativity as the measure of entanglement .The results show that the entan-glement result from the atomic coherence , if the parameters is suitable , the two-mode fields as well as the mir-ror and cavity mode are all entangled even for bad cavity limits .At he same time , the results indicate that the larger value of the injection rate of the atoms , the larger entanglement of the two cavities as well as the mirror and cavity mode .
Keywords:cavity optomechanical system  Hamiltonian  Langevin equation  stable entanglement
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