Phase space dynamics of overdamped quantum systems
Phase space dynamics of overdamped quantum systems
复制标题
过阻尼量子系统的相空间动力学
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
J. Ankerhold
中科院分区：
文献类型：
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作者：
J. Ankerhold
研究了强凝聚相中耗散量子系统的相空间动力学。基于精确路径积分方法，证明了约化密度矩阵的Wigner变换服从从高温到甚低温的Fokker-Planck型时间演化方程。讨论了量子涨落的影响，并用谐和系统的精确数据检验了这些发现的准确性。
The phase space dynamics of dissipative quantum systems in strongly condensed phase is considered. Based on the exact path integral approach, it is shown that the Wigner transform of the reduced density matrix obeys a time evolution equation of Fokker-Planck type valid from high down to very low temperatures. The effect of quantum fluctuations is discussed and the accuracy of these findings is tested against exact data for a harmonic system.