Black Hole Entropy and String Instantons

Abstract

The coupling of a string to gravity allows for Schwarzschild black holes whose entropy to area relation is $S=(A/4)(1-4\mu )$, where $\mu$ is the string tension. This departure from the A/4 universality results from a string instanton generating a black hole with smaller entropy at a temperature exceeding the Hawking value. The temperature is sensitive to the presence of classical matter outside the black hole horizon but the entropy is not. The horizon materializes at the quantum level. It is conjectured that such a macroscopic non local effect may be operative in retrieving information from incipient black holes.

LaTeX file, no figures, 23 pages. Two minor typos corrected. Final version to appear in Nuclear Physics B

References in corpus (8)

• The Stretched Horizon and Black Hole Complementarity
• Black Hole Entropy in Canonical Quantum Gravity and Superstring Theory
• Black Hole Entropy and the Dimensional Continuation of the Gauss-Bonnet Theorem
• Action and Entropy of Extreme and Non-Extreme Black Holes
• The Off-Shell Black Hole
• Source Vacuum Fluctuations of Black Hole Radiance
• Black Hole Tunneling Entropy and the Spectrum of Gravity
• Horizon Operator Approach to Black Hole Quantization

Cited by in corpus (4)

• Conformally dressed black hole in 2+1 dimensions
• Bubbles of Nothing and Supersymmetric Compactifications
• The Number of Particles Released in Gauge Cosmic String Formation
• 2+1 Black Hole with a Dynamical Conical Singularity