Minimal length effects in black hole thermodynamics from tunneling formalism

TL;DR

This paper investigates how the generalized uncertainty principle affects black hole thermodynamics, deriving corrected Hawking temperatures and entropy, and demonstrating the consistency of these corrections with known quantum effects.

Contribution

It introduces a method to incorporate generalized uncertainty principle effects into black hole thermodynamics using tunneling formalism, including summing infinite series of corrections.

Findings

GUP modifies Hawking temperature with specific correction terms.

The corrected temperature matches known back reaction effects.

Entropy includes logarithmic area corrections.

Abstract

The tunneling formalism in the Hamilton-Jacobi approach is adopted to study Hawking radiation of massless Dirac particles from spherically symmetric black hole spacetimes incorporating the effects of the generalized uncertainty principle. The Hawking temperature is found to contain corrections from the generalized uncertainty principle. Further, we show from this result that the ratio of the GUP corrected energy of the particle to the GUP corrected Hawking temperature is equal to the ratio of the corresponding uncorrected quantities. This result is then exploited to compute the Hawking temperature for more general forms of the uncertainty principle having infinite number of terms. Choosing the coefficients of the terms in the series in a specific way enables one to sum the infinite series exactly. This leads to a Hawking temperature for the Schwarzschild black hole that agrees with the result which accounts for the one loop back reaction effect. The entropy is finally computed and yields the area theorem upto logarithmic corrections.