Thermodynamics in modified gravity theories

Kazuharu Bamba*, Chao Qiang Geng, Shinji Tsujikawa

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

We demonstrate that there exists an equilibrium description of thermodynamics on the apparent horizon in the expanding cosmological background for a wide class of modified gravity theories with the Lagrangian density f(R,φ,X), where R is the Ricci scalar and X is the kinetic energy of a scalar field φ. This comes from a suitable definition of an energy momentum tensor of the "dark" component obeying the local energy conservation law in the Jordan frame. It is shown that the equilibrium description in terms of the horizon entropy S is convenient because it takes into account the contribution of the horizon entropy in non-equilibrium thermodynamics as well as an entropy production term.

本文言語English
ページ(範囲)1363-1371
ページ数9
ジャーナルInternational Journal of Modern Physics D
20
8
DOI
出版ステータスPublished - 2011 8月 15
外部発表はい

ASJC Scopus subject areas

  • 数理物理学
  • 天文学と天体物理学
  • 宇宙惑星科学

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