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arXiv · 2609.00096

Quantum corrections to the black hole entropy using the brick wall model

Gopinath Guin·Arpita Jana·Sunandan Gangopadhyay
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Abstract

It was suggested by 't Hooft that to avoid the divergence of the free energy or entropy of the probe fields, one has to introduce an infrared (IR) cutoff. This introduction of the IR cutoff, namely, the brick wall model, has been studied for the Schwarzschild black hole and has been shown by 't Hooft that to have the entropy of the order of Bekenstein-Hawking entropy, the cutoff must be of the order of Planck length. In this study, we investigated the brick wall model in the context of a Reissner-Nordstróm, quantum corrected Schwarzschild and quantum corrected Reissner-Nordström black holes. In particular, we have shown that the brick wall model can give logarithmic correction to the black hole entropy in the subleading order. The important aspect of our analysis is that we have not considered the near horizon approximation of the lapse function and get more accurate correction to the entropy. This corrected entropy has an important feature that it is larger than the usual Bekenstein-Hawking entropy which aligns with the result of Barrow entropy.

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Gopinath Guin, Arpita Jana, Sunandan Gangopadhyay. 2026-08-31. Quantum corrections to the black hole entropy using the brick wall model. https://arxiv.org/abs/2609.00096

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