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arXiv 1107.6013cond-mat.stat-mechquant-ph
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均分的量子热平衡

Quantum thermal equilibration from equipartition

A. V. Ponomarev, S. Denisov, J. Gemmer, P. Hänggi

摘要:

阐明了在不同温度下制备的两个有限的、相同的量子系统A和B之间的相互平衡问题。我们表明,这两个系统之间的能量交换过程导致准确均分能量壳在希尔伯特空间的总非相互作用,复合系统,A \otimes B。这种情况发生在系统之间的弱相互作用的一般条件下。我们预测,这种均分的唯一假设是足以获得放松的同行,A和B,对一个共同的热状态。这个猜想完全证实了一个精确的对角化的几个量子模型。

英文摘要:

The problem of mutual equilibration between two finite, identical quantum systems, A and B, prepared initially at different temperatures is elucidated. We show that the process of energy exchange between the two systems leads to accurate equipartition within energy shells in the Hilbert space of the total non-interacting, composite system, A \otimes B. This scenario occurs under the general condition of a weak interaction between the systems. We predict that the sole hypothesis of such equipartition is sufficient to obtain a relaxation of the peers, A and B, towards a common thermal-like state. This conjecture is fully corroborated by an exact diagonalization of several quantum models.

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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