Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-06-14
JHEP0801:056,2008
Physics
High Energy Physics
High Energy Physics - Theory
32 pages, LaTeX, 3 eps figures. References added, example fixed, extra appendix
Scientific paper
10.1088/1126-6708/2008/01/056
We propose that every supersymmetric four dimensional black hole of finite area can be split up into microstates made up of primitive half-BPS "atoms''. The mutual non-locality of the charges of these "atoms'' binds the state together. In support of this proposal, we display a class of smooth, horizon-free, four dimensional supergravity solutions carrying the charges of black holes, with multiple centers each carrying the charge of a half-BPS state. At vanishing string coupling the solutions collapse to a bound system of intersecting D-branes. At weak coupling the system expands into the non-compact directions forming a topologically complex geometry. At strong coupling, a new dimension opens up, and the solutions form a "foam'' of spheres threaded by flux in M-theory. We propose that this transverse growth of the underlying bound state of constitutent branes is responsible for the emergence of black hole horizons for coarse-grained observables. As such, it suggests the link between the D-brane and "spacetime foam'' approaches to black hole entropy.
Balasubramanian Vijay
Gimon Eric G.
Levi Thomas S.
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