What can the information paradox tell us about the early Universe?

Understand

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.