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arXiv 0903.4273quant-phcond-mat.stat-mech
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谐振子耗散动力学的非微扰方法

Dissipative dynamics of a Harmonic Oscillator : A non-perturbative approach

Jishad Kumar, S. Sinha, P. A. Sreeram

摘要:

本文从微观理论出发,导出了谐振子与一组无相互作用振子耦合的主方程。我们遵循一个非微扰的方法,提出了我们以前的自由布朗粒子。的扩散常数进行了计算分析和积极的主方程被示出以上的临界温度举行。我们比较的平均动能和势能与已知的热力学结果的长时间行为。在系统谐振子频率消失的极限下,恢复了自由布朗粒子的结果。

英文摘要:

Starting from a microscopic theory, we derive a master equation for a harmonic oscillator coupled to a bath of non-interacting oscillators. We follow a non-perturbative approach, proposed earlier by us for the free Brownian particle. The diffusion constants are calculated analytically and the positivity of the Master Equation is shown to hold above a critical temperature. We compare the long time behaviour of the average kinetic and potential energies with known thermodynamic results. In the limit of vainishing oscillator frequency of the system, we recover the results of the free Brownian particle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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