# Some speculations about black hole entropy in string theory

@article{Susskind1993SomeSA, title={Some speculations about black hole entropy in string theory}, author={Leonard Susskind}, journal={arXiv: High Energy Physics - Theory}, year={1993}, pages={118-131} }

The classical Bekenstein entropy of a black hole is argued to arise from configurations of strings with ends which are frozen on the horizon. Quantum corrections to this entropy are probably finite unlike the case in quantum field theory. Finally it is speculated that all black holes are single string states. The level density of strings is of the right order of magnitude to reproduce the Bekenstein entropy.

## 412 Citations

Remark on black hole entropy in string theory.

- PhysicsPhysical review. D, Particles and fields
- 1994

The string-theoretic calculation of black hole entropy is extended, first performed by Susskind and Uglum, and it is shown that the result agrees with that obtained from the classical action of string theory, using the Noether charge method developed by Wald.

The quantum structure of black holes

- Physics
- 2005

We give an elementary review of black holes in string theory. We discuss black hole entropy from string microstates and Hawking radiation from these states. We then review the structure of two-charge…

EXTREMAL BLACK HOLES AND ELEMENTARY STRING STATES

- Physics
- 1995

Some of the extremal black hole solutions in string theory have the same quantum numbers as the Bogomol’nyi saturated elementary string states. We explore the possibility that these black holes can…

Black hole entropy in loop quantum gravity

- Physics
- 2004

We calculate the black-hole entropy in loop quantum gravity as a function of the horizon area and provide the exact formula for the leading and sub-leading terms. By comparison with the…

Universal counting of black hole entropy by strings on the stretched horizon

- Physics
- 2001

We show that the entropy of any black object in any dimension can be understood as the entropy of a highly excited string on the stretched horizon. The string has a gravitationally renormalized…

Black Hole Thermodynamics in Semi-Classical and Superstring Theory

- Physics
- 1997

This is a revised and shortened version of a MSc thesis submitted to the University of Sussex, UK. An introduction into the pre-string physics of black holes and related thermodynamics is given.…

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