Holographic thermodynamics of a five-dimensional neutral Gauss-Bonnet AdS black hole

TL;DR

This paper explores the holographic thermodynamics of a five-dimensional Gauss-Bonnet AdS black hole, deriving the dual CFT thermodynamics, phase transitions, and critical behavior using extended thermodynamics and AdS/CFT correspondence.

Contribution

It introduces a detailed holographic thermodynamic framework for the five-dimensional Gauss-Bonnet AdS black hole, including new chemical potentials and phase transition analysis.

Findings

Derived the first law of CFT thermodynamics from bulk thermodynamics.

Identified phase transitions and critical points in the dual CFT.

Found critical exponents match those of the black hole, indicating universality.

Abstract

Motivated by the recent progress on the holographic dual of the extended thermodynamics for black holes in anti-de-Sitter (AdS) space, we investiggate the hologrphic thermodynamics for the five-dimensional neutral Gauss-Bonnet AdS black hole in the context of the anti-de Sitter/conformal field theory (AdS/CFT) correspondence. Through the extended bulk thermodynamics for the five-dimensional Gauss-Bonnet AdS black hole, we derive the first law of the CFT thermodynamics which is obtained by directly translating the arbitrary conformal factors in the dual CFT. In addition to the newly defined chemical potential $\mu$ conjugating to the central charge $C$, we obtain other pairs of thermodynamics for the CFT, such as the temperature $\tilde{T}$ and the entropy $S$, the Gauss-Bonnet coupling constant $\tilde{\alpha}$ and its conjugate variable $ \tilde{\mathcal{A}}$, the pressure $\mathcal{P}$ and its conjugate volume $\mathcal{V}$. In the fixed $C$, $\mathcal{V}$ and $\tilde{\alpha}$ canonical ensemble, we obtain the canonical description of the CFT thermodynamics and observe the standard swallowtail behavior in the Helmholtz free energy vs the temperature plot. The self-intersection point of the Helmholtz free energy indicates the phase transition between the high and low entropy states of the CFT. By using Maxwell's equal area law, we get the critical point and coexistence curve for the high and low entropy phases of the CFT. Besides, we get the critical exponents for the CFT, and find that the critical point and critical exponents associated with the $\tilde{T}-S$ criticality of the CFT are the same as those of the five-dimensional Gauss-Bonnet AdS black hole.