paper

Critical review of prevailing explanations for the emergence of classicality in cosmology

arXiv:2009.09999 · doi:10.1103/PhysRevD.103.043521

Abstract

There have been recent attempts at justifying, from first principles, and within the standard framework, the emergence of classical behavior in the post-inflationary cosmological context. Accounting for this emergence is an important issue, as it underlies the extraordinary empirical success of our current understanding of cosmology. In this work, we offer a critique of different efforts at explaining the emergence of classical behavior in cosmology within the standard framework. We argue that such endeavors are generically found lacking in conceptual clarity, as they invariably rely, either upon unjustified, implicit assumptions, or on circular logic. We conclude that, within the standard approach, the emergence of classical behavior in cosmology constitutes an unexplained phenomenon.

32 pages. Published version with additional section containing our reply to a note added in arXiv:2004.10684 in response to an earlier version of this paper

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