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Falling into the Past: Geodesics in a Time Travel Metric
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Queensland, Australia.
Number of Authors: 32024 (English)In: Universe, E-ISSN 2218-1997, Vol. 10, no 2, article id 95Article in journal (Refereed) Published
Abstract [en]

We investigate timelike and null geodesics within the rotating “time machine” spacetime proposed by Ralph, T.C.; et al. Phys. Rev. D 2020, 102, 124013. This is a rotating analogue of Alcubierre’s warp drive spacetime. We obtain geodesics that begin and end in the surrounding flat space region, yet achieve time travel relative to static observers there. This is a global property, as the geodesics remain locally future-pointing, as well as timelike or null.

Place, publisher, year, edition, pages
2024. Vol. 10, no 2, article id 95
Keywords [en]
general relativity, closed timeline curves, time machines
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-227783DOI: 10.3390/universe10020095ISI: 001172622000001Scopus ID: 2-s2.0-85187309337OAI: oai:DiVA.org:su-227783DiVA, id: diva2:1850287
Available from: 2024-04-10 Created: 2024-04-10 Last updated: 2024-04-10Bibliographically approved

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Costa, Fabio

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