Publication
Kinetic inflation in deformed phase space Brans-Dicke cosmology
| dc.contributor.author | Rasouli, Seyed Meraj Mousavi | |
| dc.contributor.author | Marto, João | |
| dc.contributor.author | Moniz, Paulo | |
| dc.date.accessioned | 2019-02-13T16:42:23Z | |
| dc.date.available | 2019-02-13T16:42:23Z | |
| dc.date.issued | 2019-01-16 | |
| dc.description.abstract | In this paper, by establishing a Brans-Dicke (BD) cosmology by means of a deformed phase space, in the absence of any scalar potential, cosmological constant and ordinary matter, we show that it is feasible to overcome obstacles reported in the corresponding commutative (non-deformed) frameworks. More concretely, by applying the Hamiltonian formalism and introducing a dynamical deformation, between the momenta associated to the FLRW scale factor and the BD scalar field, we obtain the modified equations of motion. In particular, these equations reduce to their standard counterparts when the noncommutative (NC) parameter is switched off. By focusing on a specific branch of solutions, in contrast to standard frameworks (even with a varying BD coupling parameter), we show that we can obtain an adequate appropriate inflationary epoch possessing a suitable graceful exit. In other words, in the Jordan frame (JF), such branch of solutions properly satisfy the sufficient condition required for satisfactory inflation, which is equivalent to get an inflationary phase in the conformal Einstein frame (EF) without branch change. Concerning the cosmological dynamics, we further show that our NC framework bears close resemblance to the $R^2$ (Starobinsky) inflationary model. | pt_PT |
| dc.description.sponsorship | COST Action CA15117 | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.doi | 10.1016/j.dark.2019.100269 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.6/6876 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.relation | SINGULARITIES, SUPERSYMMETRY AND QUANTUM COSMOLOGY | |
| dc.relation | Center of Mathematics and Applications of University of Beira Interior | |
| dc.relation.publisherversion | https://doi.org/10.1016/j.dark.2019.100269 | pt_PT |
| dc.subject | Inflation | pt_PT |
| dc.subject | Noncommutativity | pt_PT |
| dc.subject | Brans–Dicke theory | pt_PT |
| dc.title | Kinetic inflation in deformed phase space Brans-Dicke cosmology | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | SINGULARITIES, SUPERSYMMETRY AND QUANTUM COSMOLOGY | |
| oaire.awardTitle | Center of Mathematics and Applications of University of Beira Interior | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F82479%2F2011/PT | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAT%2F00212%2F2019/PT | |
| oaire.citation.startPage | 100269 | pt_PT |
| oaire.citation.title | Physics of the Dark Universe | pt_PT |
| oaire.citation.volume | 24 | pt_PT |
| oaire.fundingStream | 6817 - DCRRNI ID | |
| person.familyName | Mousavi Rasouli | |
| person.familyName | Pedro de Jesus Marto | |
| person.familyName | Moniz | |
| person.givenName | Seyed Meraj | |
| person.givenName | João | |
| person.givenName | Paulo | |
| person.identifier | 277693 | |
| person.identifier.ciencia-id | 2F16-67B1-A930 | |
| person.identifier.ciencia-id | B410-D0B7-55C1 | |
| person.identifier.orcid | 0000-0002-6282-0720 | |
| person.identifier.orcid | 0000-0003-3974-9177 | |
| person.identifier.orcid | 0000-0001-7170-8952 | |
| person.identifier.rid | M-9845-2013 | |
| person.identifier.scopus-author-id | 6701832578 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.embargofct | Copyright cedido à editora no momento da publicação | pt_PT |
| rcaap.rights | closedAccess | pt_PT |
| rcaap.type | article | pt_PT |
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