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arXiv 1403.7639hep-th
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由配分函数导出熵流:一个实例

Entropy Current from Partition Function: One Example

Sayantani Bhattacharyya

摘要:

在流体力学中,具有非负散度的熵流的存在性与静态背景下的时间无关解的存在性有关。最近有一个建议,如何建立一个熵流从平衡配分函数的流体系统。本文将该算法应用于二阶带电流体的导数展开。从配分函数出发,我们首先构造了一个熵流的例子,它具有非负的散度,直到所要求的阶数。最后,我们将其推广到最一般的形式,与局部熵产生原理相一致。作为副产品,我们得到了宇称均匀带电流体的二阶输运系数的约束条件,但在一些非标准流体框架。

英文摘要:

In hydrodynamics the existence of an entropy current with non-negative divergence is related to the existence of a time-independent solution in a static background. Recently there has been a proposal for how to construct an entropy current from the equilibrium partition function of the fluid system. In this note, we have applied this algorithm for the charged fluid at second order in derivative expansion. From the partition function we first constructed one example of entropy current with non-negative divergence upto the required order. Finally we extended it to its most general form, consistent with the principle of local entropy production. As a by-product we got the constraints on the second order transport coefficients for a parity even charged fluid, but in some non-standard fluid frame.

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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