量子Dicke模型中的纠缠动力学性质  

Dynamic Properties of Entanglement in Quantum Dicke Model

作　　者：王永超[1] 朱红波[2] 宋立军[3] 盖永杰[3] 

机构地区：[1]北华大学物理学院,吉林吉林132013 [2]东北师范大学物理学院,长春130024 [3]长春大学应用物理研究所,长春130022

出　　处：《吉林大学学报（理学版）》2008年第5期951-955,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金青年基金(批准号:10405006);吉林省教育厅科研基金(批准号:吉教科合字[2006]第90号)

摘　　要：在经典极限条件下,量子化的Dicke模型表现为量子混沌动力学特征.通过数值计算,考察Dicke模型在旋转波近似和非旋转波近似条件下,与经典相空间对应的一些特殊点的初始条件对纠缠的影响,并将所有点作为初始条件相空间整体纠缠动力学的演化特征,研究表明,经典混沌促进了纠缠的发生.Under the condition of classical limit, quantized Dicke model shows the dynamical behavior of quantum chaos. The numerical calculation shows that there are some particular points in the classical phase-space at which the quantum chaos is present. The impact of initial conditions of these particular positions on entanglement of the model was analyzed respectively under RWA rotating-wave approximation） or non-RWA. The evolutionary characteristics of the overall dynamics were studied in the phase-space for all the phase points considered to be under the initial condition. The conclusion obtained is that classical chaos will accelerate the generation of entanglement.

关 键 词：量子混沌 非旋转波近似 纠缠动力学 

分 类 号：O422[理学—声学]