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Spacetime foam: a review

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arxiv 2209.14282 v3 pith:T7D7IOBL submitted 2022-09-28 gr-qc hep-th

S. Carlip This is my paper · ORCID
classification gr-qchep-th
keywords spacetimefoamreviewattemptsdiscussextentfluctuationsgeometry
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More than 65 years ago, John Wheeler suggested that quantum uncertainties of the metric would be of order one at the Planck scale, leading to large fluctuations in spacetime geometry and topology, which he termed "spacetime foam." In this review I discuss various attempts to implement this idea and to test it, both theoretically and, to a lesser extent, observationally.

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Cited by 1 Pith paper

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  1. Prepare inflationary universe via the Euclidean charged wormhole

    gr-qc 2024-11 conditional novelty 5.0 of 10

    A semiclassical Euclidean charged wormhole with an anti-de Sitter boundary can, in a fine-tuned potential, assign higher probability to a longer inflationary period, but it does not beat the Hartle-Hawking no-boundary state.

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