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Vijay Balasubramanian et al JHEP12(2005)006 doi:10.1088/1126-6708/2005/12/006

The library of Babel: on the origin of gravitational thermodynamics

Vijay Balasubramanian1, Jan de Boer2, Vishnu Jejjala3 and Joan Simón1

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Abstract References Cited By
We show that heavy pure states of gravity can appear to be mixed states to almost all probes. For AdS5 Schwarzschild black holes, our arguments are made using the field theory dual to string theory in such spacetimes. Our results follow from applying information theoretic notions to field theory operators capable of describing very heavy states in gravity. For half-BPS states of the theory which are incipient black holes, our account is exact: typical microstates are described in gravity by a spacetime ``foam'', the precise details of which are almost invisible to almost all probes. We show that universal low-energy effective description of a foam of given global charges is via certain singular spacetime geometries. When one of the specified charges is the number of D-branes, the effective singular geometry is the half-BPS ``superstar''. We propose this as the general mechanism by which the effective thermodynamic character of gravity emerges.

Keywords

AdS-CFT and dS-CFT Correspondence

Black Holes in String Theory

 

E-print Number: hep-th/0508023

Cited: by |

Refers: to

PACS

11.25.Hf Conformal field theory, algebraic structures

04.70.Dy Quantum aspects of black holes, evaporation, thermodynamics

11.25.Uv D branes

Subjects

Gravitation and cosmology

Particle physics and field theory

Dates

Issue 12 (December 2005)

Received 11 October 2005, accepted for publication 7 November 2005

Published 2 December 2005



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