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arXiv 2211.03070quant-ph
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量子开放系统中细致平衡的破坏

Violation of Detailed Balance in Quantum Open Systems

Robert Alicki, Milan Šindelka, David Gelbwaser-Klimovsky

AI总结:

本文研究量子开放系统在稀薄气体中的动力学,发现超越Born近似时Gibbs态的细致平衡被破坏,与散射T矩阵缺乏时间反演对称性有关,导致热平衡下存在持续概率流和热流。

摘要:

我们考虑浸没于热力学平衡稀薄气体中的量子系统动力学,使用通过应用低密度极限技术推导的量子马尔可夫主方程。结果表明,在热浴温度下的Gibbs态始终是稳定的,而超越Born近似时该态的细致平衡条件可能被破坏。这种破坏通常与散射T矩阵缺乏时间反演对称性有关,产生了一种热化机制,允许在热平衡下存在持续的概率流和热流。这一现象通过一个电子在外部磁场中三个量子点之间跳跃的模型加以说明。

英文摘要:

We consider the dynamics of a quantum system immersed in a dilute gas at thermodynamics equilibrium using a quantum Markovian master equation derived by applying the low-density limit technique. It is shown that the Gibbs state at the bath temperature is always stationary while the detailed balance condition at this state can be violated beyond the Born approximation. This violation is generically related to the absence of time-reversal symmetry for the scattering T-matrix, which produces a thermalization mechanism that allows the presence of persistent probability and heat currents at thermal equilibrium. This phenomenon is illustrated by a model of an electron hopping between three quantum dots in an external magnetic field.

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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