arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1605.04789gr-qc
收藏

高阶导数引力:场方程作为状态方程

Higher derivative gravity: field equation as the equation of state

Ramit Dey, Stefano Liberati, Arif Mohd

摘要:

广义相对论的一个显著特征是,爱因斯坦方程是由施加在一小块局部构造的因果视界上的克劳修斯关系所隐含的。在过去的二十年里,人们曾多次尝试将场方程的热力学推导推广到更一般的引力理论。特别是,运动方程的最小耦合高曲率理论的重力,但没有衍生物的曲率,以前已经推导出使用热力学推理。在这一推导中,视界切片被赋予了一个熵密度,其形式类似于非同态的诺特荷,并被称为诺特熵。本文提出了一种新的熵密度,它与Noetheresque形式密切相关,使得任何非同态不变度量引力理论的场方程都可以通过在局部因果视界的一小片上施加克劳修斯关系而导出。

英文摘要:

One of the striking features of general relativity is that the Einstein equation is implied by the Clausius relation imposed on a small patch of locally constructed causal horizon. Extension of this thermodynamic derivation of the field equation to more general theories of gravity has been attempted many times in the last two decades. In particular, equations of motion for minimally coupled higher curvature theories of gravity, but without the derivatives of curvature, have previously been derived using a thermodynamic reasoning. In that derivation the horizon slices were endowed with an entropy density whose form resembles that of the Noether charge for diffeomorphisms, and was dubbed the Noetheresque entropy. In this paper, we propose a new entropy density, closely related to the Noetheresque form, such that the field equation of any diffeomorphism invariant metric theory of gravity can be derived by imposing the Clausius relation on a small patch of local causal horizon.

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。

↑