A Description of multi Charged Black Holes in terms of Branes and Antibranes

TL;DR

This paper models multicharged black holes using branes and antibranes with multiple gas copies, showing entropy agreement with supergravity and providing a new interpretation that avoids the unnatural equal energy assumption.

Contribution

It introduces a novel interpretation of multicharged black holes in terms of branes and antibranes that aligns entropy calculations without assuming equal energies.

Findings

Entropy matches supergravity results up to a factor X

X equals 1 with a specific normalization

Brane tensions are reduced by a factor of 4

Abstract

We describe multicharged black holes in terms of branes and antibranes together with multiple copies of gas of massless excitations. Assuming that energies of these copies of gas are all equal, we find that the entropy of the brane antibrane configuration agrees with that of the multicharged black hole in supergravity approximation, upto a factor X. We find that X = 1 for a suitable normalisation which admits a simple empirical interpretation that the available gas energy is all taken by one single gas which is, in a sense, a certain superposition of the multiple copies; and that the brane tensions are decreased by a factor of 4. This interpretation renders superfluous the assumption of equal energies, which is unnatural from a physical point of view.