On the entropy associated with the interior of a black hole

TL;DR

This paper examines the entropy related to the interior volume of black holes, clarifying previous conflicting results and emphasizing the importance of the black hole's interior in understanding its quantum nature.

Contribution

The paper clarifies discrepancies in previous entropy calculations and emphasizes the significance of the black hole interior in entropy analysis.

Findings

Entropy proportional to surface area but with different coefficients

Previous calculations are unrelated to the black hole interior

Highlights importance of interior volume in quantum black hole studies

Abstract

The investigation about the volume of a black hole is closely related to the quantum nature of the black hole. The entropy is a significant concept for this. A recent work by Majhi and Samanta [Phys. Lett. B 770 (2017) 314] after us presented a similar conclusion that the entropy associated with the volume is proportional to the surface area of the black hole, but the proportionality coefficient is different from our earlier result. In this paper, we clarify the difference and show that their calculation is unrelated to the interior of the black hole.