# The information paradox for cosmology

Date:

01/25/2021 - 2:00pm

Location:

zoom

Speaker(s) / Presenter(s):

Samir Mathur, OSU

Abstract:

The information paradox demands a large departure from semiclassical physics at the black hole horizon. We will develop a similar paradox for cosmology, which will tell us that new physics has to emerge at the scale of the cosmological horizon. For the black hole, the novel effects emerge from the dynamics of vecros: virtual fluctuations of fuzzball-like configurations; the large action for these fluctuations is compensated by the large degeneracy of possible fluctuations. In cosmology, one finds a new variable required to define the spacetime: the vecro distribution function (VDF), which affects dynamics at the scale of the cosmological horizon. We speculate on how the VDF may address the cosmological constant problem, provide a source for inflaton energy and the dark energy today.

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