Quantum Corrections to the Accretion onto a Schwarzschild Black Hole in the Background of Quintessence

TL;DR

This paper investigates how quantum effects and quintessence scalar fields influence accretion processes onto Schwarzschild black holes, revealing finite energy densities at the core and drawing parallels between quantum fluctuations and electric charge effects.

Contribution

It combines quantum corrections and quintessence effects on Schwarzschild black holes to analyze their combined impact on accretion, a novel integration of these factors.

Findings

Quantum corrections lead to finite energy density at the black hole's core.

Presence of quintessence modifies accretion parameters.

Quantum fluctuations mimic effects of electric charge in spacetime.

Abstract

It is well known that quantum effects may lead to remove the intrinsic singularity point of back holes. Also, the quintessence scalar field is a candidate model for describing late-time acceleration expansion. Accordingly, Kazakov and Solodukhin considered the existence of back-reaction of the spacetime due to the quantum fluctuations of the background metric to deform Schwarzschild black hole, which led to change the intrinsic singularity of the black hole to a 2-sphere with a radius of the order of the Planck length. Also, Kiselev rewrote the Schwarzschild metric by taking into account the quintessence field in the background. In this study, we consider the quantum-corrected Schwarzschild black hole inspired by Kazakov-Solodukhin's work, and Schwarzschild black hole surrounded by quintessence deduced by Kiselev to study the mutual effects of quantum fluctuations and quintessence on the accretion onto the black hole. Consequently, the radial component of 4-velocity and the proper energy density of the accreting fluid have a finite value on the surface of its central 2-sphere due to the presence of quantum corrections. Also, by comparing the accretion parameters in different kinds of black holes, we infer that the presence of a point-like electric charge in the spacetime is somewhat similar to some quantum fluctuations in the background metric.