Four Dimensional Black Holes and Strings with Rescaled Tension

TL;DR

This paper provides a microscopic string theory description of four-dimensional extremal and near-extremal Reissner-Nordstrom black holes, incorporating tension rescaling effects due to the Rindler background, successfully matching black hole entropy.

Contribution

It introduces a novel microscopic model using fundamental strings with rescaled tension in a magnetic brane background to describe black hole entropy.

Findings

Black hole entropy matches string model predictions

Rescaled string tension accounts for Rindler space effects

Microscopic description applies to extremal and near-extremal cases

Abstract

We give a microscopic description of extreme and near-extreme Reissner-Nordstrom black holes in four dimensions in terms of fundamental strings in a background of magnetic five branes and monopoles. The string oscillator numbers and tension are rescaled due to the Rindler space background with the string mass fixed. The entropy of the black holes is reproduced correctly by that of the string with the tension rescaling taken into account.