Shocks and information exchange in de Sitter space

DOI10.1007/JHEP10(2021)104zbMATH Open1476.83069arXiv2105.12737MaRDI QIDQ825716

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Publication date: 17 December 2021

Published in: (Search for Journal in Brave)

Abstract: We discuss some implications of recent progress in understanding the black hole information paradox for complementarity in de Sitter space. Extending recent work by two of the authors, we describe a bulk procedure that allows information expelled through the cosmological horizon to be received by an antipodal observer. Generically, this information transfer takes a scrambling time $t=H^{-1}log(S_{mdS})$. We emphasize that this procedure relies crucially on selection of the Bunch-Davies vacuum state, interpreted as the thermofield double state that maximally entangles two antipodal static patches. The procedure also requires the presence of an (entangled) energy reservoir, created by the collection of Hawking modes from the cosmological horizon. We show how this procedure avoids a cloning paradox and comment on its implications.

Full work available at URL: https://arxiv.org/abs/2105.12737

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