Black hole entropy, curved space and monsters

Details Black hole entropy, curved space and monsters Black hole entropy, curved space and monsters

2007-06-21

arxiv.org/abs/0706.3239v2

Phys.Lett.B658:244-248,2008

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, revtex. Final version to appear Physics Letters B

Scientific paper

10.1016/j.physletb.2007.09.021

We investigate the microscopic origin of black hole entropy, in particular the gap between the maximum entropy of ordinary matter and that of black holes. Using curved space, we construct configurations with entropy greater than their area in Planck units. These configurations have pathological properties and we refer to them as monsters. When monsters are excluded we recover the entropy bound on ordinary matter $S < A^{3/4}$. This bound implies that essentially all of the microstates of a semiclassical black hole are associated with the growth of a slightly smaller black hole which absorbs some additional energy. Our results suggest that the area entropy of black holes is the logarithm of the number of distinct ways in which one can form the black hole from ordinary matter and smaller black holes, but only after the exclusion of monster states.

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