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Instanton tunneling for de Sitter space with real projective spatial sections
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Shanghai Jiao Tong University, China; Leibniz Universit├Ąt Hannover, Germany.
Number of Authors: 2
2017 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 4, 040Article in journal (Refereed) Published
Abstract [en]

The physics of tunneling from one spacetime to another is often understood in terms of instantons. For some instantons, it was recently shown in the literature that there are two complementary interpretations for their analytic continuations. Dubbed something-to-something and nothing-to-something interpretations, respectively, the former involves situation in which the initial and final hypersurfaces are connected by a Euclidean manifold, whereas the initial and final hypersurfaces in the latter case are not connected in such a way. We consider a de Sitter space with real projective space RP3 spatial sections, as was originally understood by de Sitter himself. This original version of de Sitter space has several advantages over the usual de Sitter space with S-3 spatial sections. In particular, the interpretation of the de Sitter entropy as entanglement entropy is much more natural. We discuss the subtleties involved in the tunneling of such a de Sitter space.

Place, publisher, year, edition, pages
2017. no 4, 040
Keyword [en]
quantum cosmology, gravity
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-144729DOI: 10.1088/1475-7516/2017/04/040ISI: 000401806200040OAI: oai:DiVA.org:su-144729DiVA: diva2:1127906
Available from: 2017-07-20 Created: 2017-07-20 Last updated: 2017-07-20Bibliographically approved

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Ong, Yen Chin
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Nordic Institute for Theoretical Physics (Nordita)
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