Braneless Black Holes

TL;DR

This paper proposes a new string-based approach to black hole entropy, involving tension rescaling interpreted as a gravitational redshift, successfully reproducing black hole entropies across dimensions.

Contribution

It introduces a model where string tension rescaling accounts for black hole entropy, extending D-brane theory to larger Schwarzschild radii.

Findings

Rescaling of string tension as gravitational redshift.

Connection between string level number and Rindler energy.

Reproduction of black hole entropies in various dimensions.

Abstract

It is known that the naive version of D-brane theory is inadequate to explain the black hole entropy in the limit in which the Schwarzschild radius becomes larger than all compactification radii. We present evidence that a more consistent description can be given in terms of strings with rescaled tensions. We show that the rescaling can be interpreted as a redshift of the tension of a fundamental string in the gravitational field of the black hole. An interesting connection is found between the string level number and the Rindler energy. Using this connection, we reproduce the entropies of Schwarzschild black holes in arbitrary dimensions in terms of the entropy of a single string at the Hagedorn temperature.