Spacetime foam, midisuperspace, and the cosmological constant
General Relativity and Quantum Cosmology
2021-12-06 v1 High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.2112.01628,
title = {Spacetime foam, midisuperspace, and the cosmological constant},
author = {S. Carlip},
journal= {arXiv preprint arXiv:2112.01628},
year = {2021}
}
Comments
based on a talk at the online conference "The Quantum, the Gravity"; to appear in Universe; more details in arXiv:1809.08277 and arXiv:2106.09751