Tuesday, May 15, 2012

1205.3140 (Samir D. Mathur)

What can the information paradox tell us about the early Universe?    [PDF]

Samir D. Mathur
In recent years we have come to understand how the information paradox is resolved in string theory. The huge entropy $S_{bek}={A\over 4G}$ of black holes is realized by an explicit set of horizon sized `fuzzball' wavefunctions. The wavefunction of a collapsing shell spreads relatively quickly over this large phase space of states, invalidating the classical black hole geometry the shell would have created. We argue that a related effect may occur in the early Universe. When matter is crushed to high densities we can access a similarly large phase space of gravitational `fuzzball' solutions. While we cannot estimate specific quantities at this point, a qualitative analysis suggests that spreading over phase space creates an extra `push' expanding the Universe to larger volumes.
View original: http://arxiv.org/abs/1205.3140

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