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非旋波近似下级联型三能级原子与腔场相互作用的量子动力学性质

刘三秋 郭 琴 陶向阳 付传鸿

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非旋波近似下级联型三能级原子与腔场相互作用的量子动力学性质

刘三秋, 郭 琴, 陶向阳, 付传鸿

QUANTUM DYNAMICS OF A CASCADE THREE-LEVEL ATOM INTERACTING WITH COHERENT STATE IN THE COUNTER ROTATING WAVE APPROXIMATION

LIU SAN-QIU, GUO QIN, TAO XIANG-YANG, FU CHUAN-HONG
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  • 研究非旋波近似下级联型三能级原子与单模腔场的相互作用.结果表明:非旋波近似下,由于虚光场的影响,辐射场的平均光子数和二阶相干度的演化曲线均出现了“小锯齿状”,表现为系统的量子噪声,随着ω和的增大,量子噪声分别减小和增大;非旋波近似下,系统的反聚束效应较旋波近似的强;研究结果还揭示了平均光子数N(t)和二阶相干度g2(t)与原子-场耦合系数λ的关系.
    The dynamics of a cascade three-level atom interacting with the single mode coherent state under the Counter-Rotating-Wave approximation (C-RWA) is investigated.The properties of the mean-photon number (N(t)) and the degree of second-order coherence (g2(t)) are analyzed in this model.The little indentation which represents the quantum noise of the system appears in the evolution curves of the mean-photon number and the degree of second-order coherence under the C-RWA.The quantum noise which is caused by the virtual photon field gradually becomes weak when ω increases.The quantum noise increases when increases.The anti-bunching effect of the system under the C-RWA is stronger than the one under the RWA.Besides,the relation of N(t) and g2(t) with the atom-field coupling constant λ is revealed in our results.
    • 基金项目: 江西省自然科学基金资助的课题.
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出版历程
  • 收稿日期:  1997-10-27
  • 修回日期:  1998-04-06
  • 刊出日期:  1998-09-20

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