Entropy Function for Non-Extremal Black Holes in String Theory

TL;DR

This paper extends the entropy function formalism to non-extremal black holes in string theory, demonstrating its effectiveness in calculating their entropy in various dimensions, including cases with BTZ geometry.

Contribution

The authors generalize the entropy function formalism to non-extremal black holes with BTZ geometry in string theory, showing it accurately reproduces their entropy.

Findings

Entropy function formalism applies to non-extremal black holes.

Successfully reproduces Bekenstein-Hawking entropy in multiple dimensions.

Validates the formalism for black holes with BTZ near horizon geometry.

Abstract

We generalize the entropy function formalism to five-dimensional and four-dimensional non-extremal black holes in string theory. In the near horizon limit, these black holes have BTZ metric as part of the spacetime geometry. It is shown that the entropy function formalism also works very well for these non-extremal black holes and it can reproduce the Bekenstein-Hawking entropy of these black holes in ten dimensions and lower dimensions.