Universality on thermodynamic relation with corrections in Einstein-Bel-Robinson gravity Black hole

TL;DR

This paper extends the Goon-Penco thermodynamic relation to include higher-order state parameter dependencies in Einstein-Bel-Robinson gravity black holes, proposing a universal relation applicable to various spacetime thermodynamics scenarios.

Contribution

It introduces a generalized universal thermodynamic relation considering multiple higher-order state parameters and proposes a new conjecture on universal relations between displaced thermodynamic quantities.

Findings

Established a universal relation for multiple thermodynamic variables.

Derived an analytic expression for the perturbation parameter as a function of entropy.

Proposed a conjecture on universal relations in spacetime thermodynamics.

Abstract

The generalized thermodynamic extremum relation, as proposed by Goon and Penco, establishes a novel theoretical framework for the study of spacetime thermodynamics. However, extant investigations generally assume that the black hole state parameter is solely a first-order function of the perturbation parameter when exploring the Goon-Penco relation in diverse spacetime contexts. An analytic expression for the perturbation parameter as a function of the black hole entropy can be expressed by treating the black hole mass as constant. The present study addresses this limitation and provides insight into the universal Goon-Penco relation when multiple thermodynamic state parameters behave as higher order functions of the perturbation parameters. Notably, we have not only established a universal relational formula in the case of multiple state variables, but more importantly, we have put forward an innovative conjecture that reveals the existence of a universal relation between displaced thermodynamic quantities in spacetime in the context of an arbitrary black hole. These theoretical breakthroughs are expected to open up new exploration directions for quantum gravity research.