Quantum-Corrected Thermodynamics of Conformal Weyl Gravity Black Holes: GUP Effects and Phase Transitions

TL;DR

This paper explores quantum-corrected thermodynamics of black holes in Conformal Weyl Gravity, revealing how quantum effects and CWG parameters influence phase transitions, stability, and thermodynamic behavior near the Planck scale.

Contribution

It introduces a systematic analysis of quantum gravitational effects on CWG black holes, including quantum corrections, phase transitions, and thermodynamic potentials, extending beyond classical GR results.

Findings

Quantum corrections suppress Hawking radiation near the Planck scale.

Thermodynamic phase transitions are influenced by CWG parameters, especially $eta$, $ extgamma$, and $k$.

Inversion points in Joule-Thomson expansion shift with CWG parameters, indicating QC phase transitions.

Abstract

We investigate the thermodynamic properties of black holes in Conformal Weyl Gravity (CWG) using the Mannheim-Kazanas solution, with particular emphasis on quantum corrections that become significant near the Planck scale. Our analysis employs the Hamilton-Jacobi tunneling formalism to derive the Hawking temperature, revealing explicit contributions from the conformal parameters $\beta$, $\gamma$, and $k$ that lead to substantial deviations from the behavior of a Schwarzschild black hole. We incorporate quantum gravitational effects through the Generalized Uncertainty Principle, demonstrating systematic suppression of thermal radiation in the near-Planckian regime. Using an exponentially corrected entropy model, we compute the complete spectrum of QC thermodynamic potentials, including internal energy, pressure, heat capacity, and free energies. Our heat capacity analysis shows divergence behavior that separates stable and unstable regions, indicating possible thermodynamic transitions controlled by the scale-dependent parameter $\gamma$. The Joule-Thomson expansion analysis shows distinct cooling and heating regimes with inversion points that shift systematically with CWG parameters, capturing QC phase transitions absent in general relativity. We also examine gravitational redshift in CWG geometry, finding complex radial dependence that highlights modifications compared to the Schwarzschild case, although redshift alone cannot observationally distinguish CWG from Einstein's theory. Our results demonstrate that CWG offers a consistent framework for studying black hole thermodynamics beyond general relativity, with quantum corrections modifying phase structures in the near-Planckian regime, though these effects are not expected to yield direct observational consequences.