$P-V$ criticality and Joule-Thomson Expansion of Hayward-AdS black holes in 4D Einstein-Gauss-Bonnet gravity

Abstract

In this paper, the P − V criticality and Joule-Thomson Expansion of Hayward-AdS black holes in 4D Einstein-Gauss-Bonnet gravity are studied in the extended phase space. We find the black hole always exhibits a phase transition similar to that of the Van der Waals system for any arbitrary positive parameters α and g. We also study the dependence of α and g on the inversion curves and plot the inversion and isenthalpic curves in the T − P plane, which can determine the cooling-heating regions.

AdS Black Hole Thermodynamics and Microstructures from f(Q)$f(Q)$ Gravitation

“…2 Δl 2 will be the probability of discovering the system in the intervals (x 0 , x 0 + dx 0 ) and (x 1 , x 1 + dx 1 ), where K B is the Boltzmann constant. From (34), the distance between two adjacent fluctuation states measured by the line element of Ruppeiner geometry can be expressed as, [39]…”

“…In the current study, in addition to the entropy and temperature we add cosmological constant as a pressure P into our thermodynamical system [34] :…”