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We review recent developments in the treatment of spherically symmetric black holes in loop quantum gravity. In particular, we discuss an exact solution to the quantum constraints that represents a black hole and is free of singularities. We show that new observables that are not present in the classical theory arise in the quantum theory. We also discuss Hawking radiation by considering the quantization of a scalar field on the quantum spacetime. [ABSTRACT FROM AUTHOR]

Quantization of different regions of the Reissner-Nordstro¨m space time (charged black hole) is done in the framework of loop quantum gravity. The geometry of Reissner-Nordstro¨m space-time is expressed in terms of Ashtekar variables which form the classical phase space of such a black hole. Using the loop quantization of phase space, the issue of singularity avoidance of such a black hole is addressed; based on spherically symmetry reduced models of loop quantum gravity, the operator analogue of the diverging factor of scalar curvature of the charged black hole is constructed and is shown to exhibit an upper bounded spectrum. This local criterion, together with the global one (non-singular quantum evolution equation) proves the avoidance of charged black hole singularity in symmetry reduced models of loop quantum gravity. [ABSTRACT FROM AUTHOR]

This is an overview for non-specialists of some of the progress in research on black holes in String and Supergravity theories, mostly focused on the search and study of explicit classical solutions describing them. [ABSTRACT FROM AUTHOR]

Recently, Gaiotto, Strominger and Yin have proposed a holographic representation of the microstates of certain N = 2 black holes as chiral primaries of a superconformal quantum mechanics living on D0-branes in the attractor geometry. We show that their proposal can be succesfully applied to ‘small’ black holes which are dual to Dabholkar-Harvey states and have vanishing horizon area in the leading supergravity approximation. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]