Accretion of Phantom Energy and Generalized Second Law of Thermodynamics for Einstein-Maxwell-Gauss-Bonnet Black Hole

TL;DR

This paper studies how phantom energy accretion affects a 5D Einstein-Maxwell-Gauss-Bonnet black hole's mass and examines the validity of the generalized second law of thermodynamics, deriving bounds on phantom energy pressure.

Contribution

It provides a novel analysis of phantom energy accretion on EMGB black holes and establishes thermodynamic constraints specific to this higher-dimensional gravity model.

Findings

Black hole mass evolution depends only on phantom energy pressure and density.

Derived a lower bound on phantom energy pressure for GSL validity.

Showed that black hole mass change is independent of initial mass.

Abstract

We have investigated the accretion of phantom energy onto a 5-dimensional extreme Einstein-Maxwell-Gauss-Bonnet (EMGB) black hole. It is shown that the evolution of the EMGB black hole mass due to phantom energy accretion depends only on the pressure and density of the phantom energy and not on the black hole mass. Further we study the generalized second law of thermodynamics (GSL) at the event horizon and obtain a lower bound on the pressure of the phantom energy.