Dynamics of thermalization and decoherence of a nanoscale system.
Dynamics of thermalization and decoherence of a nanoscale system.
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DOI：
10.1103/physrevlett.111.130408
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发表时间：
2013-06
影响因子：
8.6
通讯作者：
S. Genway;A. Ho;D. Lee
中科院分区：
文献类型：
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作者：
S. Genway;A. Ho;D. Lee
我们研究了非微扰耦合到完全量子力学浴的纳米系统的退相干和热化动力学。该系统是在整个系统的纯态下从平衡态制备的。我们提出了一个随机矩阵模型，并分析表明，有两个强大的时间制度的方法系统的平衡-一个初始的高斯衰减，其次是指数尾，符合数值结果的小相互作用晶格[S. Genway，A. F. Ho和D. K. K. Lee，Phys. Rev. Lett. 105，260402（2010）]。此外，系统按照本征态热化假设向吉布斯系综衰减。
We study the decoherence and thermalization dynamics of a nanoscale system coupled nonperturbatively to a fully quantum-mechanical bath. The system is prepared out of equilibrium in a pure state of the complete system. We propose a random matrix model and show analytically that there are two robust temporal regimes in the approach of the system to equilibrium-an initial Gaussian decay followed by an exponential tail, consistent with numerical results on small interacting lattices [S. Genway, A. F. Ho, and D. K. K. Lee, Phys. Rev. Lett. 105, 260402 (2010)]. Furthermore, the system decays towards a Gibbs ensemble in accordance with the eigenstate thermalization hypothesis.