Spacetime Foam, Midisuperspace, and the Cosmological Constant

Carlip, Steven

doi:10.3390/universe7120495

Title: Spacetime Foam, Midisuperspace, and the Cosmological Constant

Journal Article · 15 December 2021 · Universe

DOI: https://doi.org/10.3390/universe7120495 · OSTI ID:1836140

Perhaps the cosmological constant really is huge at the Planck scale, but is “hidden” by Planck scale quantum fluctuations of spacetime. I briefly review this proposal and provide some evidence, coming from a simplified midisuperspace model, that an appropriate “foamy” structure can do the job of hiding a large cosmological constant, and can persist under time evolution.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-91ER40674

OSTI ID:: 1836140

Journal Information:: Universe, Journal Name: Universe Journal Issue: 12 Vol. 7; ISSN 2218-1997; ISSN UNIVB9

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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