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arXiv 1002.1453math.APmath-phmath.MP
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量子统计物理中的一个反问题

An inverse problem in quantum statistical physics

Florian Méhats, Olivier Pinaud

摘要:

我们解决了量子统计物理中的一个反问题:量子自由能(von Neumann熵+动能)是否在具有给定局域密度$n(x)$的密度算符中存在唯一的极小值?我们在第一个方面对这个问题作出了肯定的回答。这使得能够严格定义局域量子平衡或量子麦克斯韦的概念,这是最近导出的量子流体动力学模型和量子漂移扩散模型的基础。我们还描述了这个独特的极小,它采取的形式与量子化学势的全球热力学平衡(正则系综)。

英文摘要:

We address the following inverse problem in quantum statistical physics: does the quantum free energy (von Neumann entropy + kinetic energy) admit a unique minimizer among the density operators having a given local density $n(x)$? We give a positive answer to that question, in dimension one. This enables to define rigourously the notion of local quantum equilibrium, or quantum Maxwellian, which is at the basis of recently derived quantum hydrodynamic models and quantum drift-diffusion models. We also characterize this unique minimizer, which takes the form of a global thermodynamic equilibrium (canonical ensemble) with a quantum chemical potential.

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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