What question did this study set out to answer?

This research aims to uncover a conformal field theory model that describes black holes within string theory.

String theory and black holes

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Exact conformal field theory describes black holes, suggesting connections to quantum mechanics of matter.

This research aims to uncover a conformal field theory model that describes black holes within string theory.
Identified a model using SL(2,R)/U(1) gauged Wess-Zumino-Witten.
Analyzed properties of the conformal field theory at k=9/4 and its relation to the c=1 matrix model.
Investigated the behavior at singularities and implications for Hawking black-hole evaporation.
The conformal field theory is regular at the Riemannian singularity, but generic perturbations lead to blow-ups.
The endpoint of Hawking black-hole evaporation aligns with the c=1 matrix model's space-time structure.
Establishes a connection between the c=1 model and the extreme Reissner-Nordström black hole in four-dimensional general relativity.

Edward Witten (1991) studied this question.

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