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arXiv 2104.11380nucl-th
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动量相关弛豫时间与相对论流体力学理论场重定义的对应

Correspondence between momentum dependent relaxation time and field redefinition of relativistic hydrodynamic theory

Sukanya Mitra

摘要:

本文通过相对论输运方程的动量相关弛豫时间近似(MDRTA)解,建立了非平衡系统耗散与宏观变量热力学场重新定义之间的对应关系。在这里,它已被证明,平衡热力学领域是不是唯一定义的,并受到包括介质的耗散效应。二阶相对论流体动力学理论已经发展包括这样的耗散效应。发展流体动力学理论的必要条件已经实现,(i)热力学恒等式,将这些重新定义的领域已被证明是完美地保存下MDRTA的能量动量张量,(ii)的非负熵产生仍然不受列入这样的耗散贡献,只要独立的输运系数保持为正值。

英文摘要:

In this article a correspondence has been established between the out of equilibrium system dissipation and the thermodynamic field redefinition of the macroscopic variables through the momentum dependent relaxation time approximation (MDRTA) solution of relativistic transport equation. Here, it has been shown that the out of equilibrium thermodynamic fields are not uniquely defined and are subjected to include dissipative effects from the medium. A second order relativistic hydrodynamic theory has been developed including such dissipative effects. The necessary conditions for developing a hydrodynamic theory has been fulfilled, (i) the thermodynamic identities incorporating such redefined fields have been shown to conserve the energy-momentum tensor perfectly under MDRTA, (ii) the non-negativity of entropy production remains unaffected by the inclusion of such dissipative contributions in hydro fields as long as the independent transport coefficients remain positive.

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