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arXiv 0904.0950cond-mat.stat-mechquant-ph
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驱动系统的量子Smoluchowski方程

Quantum Smoluchowski equation for driven systems

Raoul Dillenschneider, Eric Lutz

摘要:

我们考虑一个与热浴强耦合的受驱动量子谐振子。从精确的量子朗之万方程出发,我们用格林函数方法确定了相应的维格纳相空间分布的半经典方程。在高摩擦极限下,我们应用Brinkman方法导出了位置空间中概率分布的量子Smoluchowski方程。我们进一步确定了方程的有效范围,并讨论了布朗参数振子的特殊情况。

英文摘要:

We consider a driven quantum harmonic oscillator strongly coupled to a heat bath. Starting from the exact quantum Langevin equation, we use a Green's function approach to determine the corresponding semiclassical equation for the Wigner phase space distribution. In the limit of high friction, we apply Brinkman's method to derive the quantum Smoluchowski equation for the probability distribution in position space. We further determine the range of validity of the equation and discuss the special case of a Brownian parametric oscillator.

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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