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.
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 .
出处
《渤海大学学报（自然科学版）》
CAS
2014年第2期114-118,共5页
Journal of Bohai University:Natural Science Edition
基金
国家自然科学基金(No:11305016)
关键词
腔光力系统
哈密顿
朗之万方程
稳态纠缠
cavity optomechanical system
Hamiltonian
Langevin equation
stable entanglement
