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Entanglement entropy in a four-dimensional cosmological background

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arxiv 2203.06699 v1 pith:ZWIVKSEO submitted 2022-03-13 hep-th

Vangelis Giantsos , Nikolaos Tetradis This is my paper · ORCID
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keywords entropybackgroundcosmologicalentanglementsurfaceareaassociatedbeyond
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We compute the holographic entanglement entropy of a thermalized CFT on a time-dependent background in four dimensions. We consider a slab configuration extending beyond the cosmological horizon of a Friedmann-Lemaitre-Robertson-Walker metric. We identify a volume term that corresponds to the thermal entropy of the CFT, as well as terms proportional to the proper area of the entangling surface which are associated with strongly entangled degrees of freedom in the vicinity of this surface or with the expansion.

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  1. Entanglement Entropy and Complexity of Multicomponent Universe from Holography

    hep-th 2026-01 conditional novelty 4.0 of 10

    For two-component FLRW universes built from an AdS black brane plus p-brane gas, holographic entanglement entropy scales as tau early and as tau^{4/3} (dark matter) or tau^2 (exotic matter) late, while volume complexi...

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