Entropy and irreversible processes in gravity and cosmology

被引：0

作者：

Espinosa-Portales, Llorenc ^{[1
]}

Garcia-Bellido, Juan ^{[1
]}

机构：

[1] UAM, CSIC, Inst Fis Teor, Madrid 28049, Spain

来源：

SIXTEENTH MARCEL GROSSMANN MEETING | 2023年

关键词：

General Relativity; thermodynamics; non-equilibrium phenomena; entropic forces; cosmic acceleration; LAGRANGIAN VARIATIONAL FORMULATION; GRAVITATIONAL COLLAPSE;

D O I：

10.1142/9789811269776_0220

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

General Relativity is a priori a theory invariant under time reversal. Its integration with the laws of thermodynamics allows for a formulation of non-equilibrium phenomena in gravity and the introduction of an arrow of time, i.e. the the breaking of such invariance. Even though most of the evolution of the universe takes place in local thermal equilibrium, the effects of irreversible processes on the expansion via entropic forces may be phenomenologically relevant. We review our previous work on the covariant formulation of non-equilibrium thermodynamics in General Relativity and the proposal to explain the recent cosmic acceleration from it.

引用

页码：2737 / 2752

页数：16

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