Quantum cosmology with third quantisation

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dc.contributor.author Robles Pérez, Salvador José
dc.date.accessioned 2022-04-27T10:12:59Z
dc.date.available 2022-04-27T10:12:59Z
dc.date.issued 2021-11
dc.identifier.bibliographicCitation Robles-Pérez, S. J. (2021). Quantum Cosmology with Third Quantisation. Universe, 7(11), 404.
dc.identifier.issn 2218-1997
dc.identifier.uri http://hdl.handle.net/10016/34635
dc.description.abstract We reviewed the canonical quantisation of the geometry of the spacetime in the cases of a simply and a non-simply connected manifold. In the former, we analysed the information contained in the solutions of the Wheeler-DeWitt equation and showed their interpretation in terms of the customary boundary conditions that are typically imposed on the semiclassical wave functions. In particular, we reviewed three different paradigms for the quantum creation of a homogeneous and isotropic universe. For the quantisation of a non-simply connected manifold, the best framework is the third quantisation formalism, in which the wave function of the universe is seen as a field that propagates in the space of Riemannian 3-geometries, which turns out to be isomorphic to a (part of a) 1 + 5 Minkowski spacetime. Thus, the quantisation of the wave function follows the customary formalism of a quantum field theory. A general review of the formalism is given, and the creation of the universes is analysed, including their initial expansion and the appearance of matter after inflation. These features are presented in more detail in the case of a homogeneous and isotropic universe. The main conclusion in both cases is that the most natural way in which the universes should be created is in entangled universe-antiuniverse pairs.
dc.description.sponsorship This work was supported by Comunidad de Madrid (Spain) under the Multiannual Agreement with UC3M in the line of Excellence of University Professors (EPUC3M23), in the context of the 5th. Regional Programme of Research and Technological Innovation (PRICIT).
dc.format.extent 62
dc.language.iso eng
dc.publisher MDPI
dc.rights (copyright) 2021 by the authors.
dc.rights Atribución 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by/3.0/es/
dc.subject.other Multiverse
dc.subject.other Quantum cosmology
dc.subject.other Superspace
dc.subject.other Third quantisation
dc.subject.other Universe-antiuniverse pair
dc.title Quantum cosmology with third quantisation
dc.type article
dc.subject.eciencia Física
dc.subject.eciencia Matemáticas
dc.identifier.doi https://doi.org/10.3390/universe7110404
dc.rights.accessRights openAccess
dc.relation.projectID Comunidad de Madrid. EPUC3M23
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 11
dc.identifier.publicationlastpage 62
dc.identifier.publicationtitle Universe
dc.identifier.publicationvolume 7
dc.identifier.uxxi AR/0000030413
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