Decoupling quantum dissipation interaction via stochastic fields.
Decoupling quantum dissipation interaction via stochastic fields.
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DOI：
10.1063/1.1647528
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发表时间：
2004-03
期刊：
影响因子：
--
通讯作者：
J. Shao
中科院分区：
文献类型：
--
作者：
J. Shao
基于哈伯德-斯特拉托诺维奇变换，感兴趣的系统和热浴之间的耗散相互作用被解耦，并且分离的系统和浴因此在常见的经典随机场中演化。这种操作使我们能够建立一种新颖的理论方法，通过该方法将降低的密度矩阵表示为辅助白噪声场中其随机实现的集合平均值。在随机描述中，系统和浴之间的相互作用反映在相互感应的平均场中。揭示了路径积分框架中浴诱发场与影响函数之间的关系。作为这种方法的演示，我们推导了两个模型系统的精确主方程。
Based on the Hubbard-Stratonovich transformation, the dissipative interaction between the system of interest and the heat bath is decoupled and the separated system and bath thus evolve in common classical random fields. This manipulation allows us to establish a novel theoretical methodology by which the reduced density matrix is formulated as an ensemble average of its random realizations in the auxiliary white noise fields. Within the stochastic description, the interaction between the system and the bath is reflected in the mutually induced mean fields. The relationship between the bath-induced field and the influence functional in the path integral framework is revealed. As a demonstration of this approach, we derive the exact master equations for two model systems.