Publicação
Coupled phantom cosmological model motivated by the warm inflationary paradigm
| datacite.subject.sdg | 04:Educação de Qualidade | |
| datacite.subject.sdg | 09:Indústria, Inovação e Infraestruturas | |
| datacite.subject.sdg | 13:Ação Climática | |
| dc.contributor.author | Halder, Sudip | |
| dc.contributor.author | Pan, Supriya | |
| dc.contributor.author | Sá, Paulo | |
| dc.contributor.author | Saha, Tapan | |
| dc.date.accessioned | 2026-04-08T12:18:27Z | |
| dc.date.available | 2026-04-08T12:18:27Z | |
| dc.date.issued | 2024-09-12 | |
| dc.description.abstract | In this article, we investigate a coupled phantom dark-energy cosmological model in which the coupling term between a phantom scalar field with an exponential potential and a pressureless dark-matter fluid is motivated by the warm inflationary paradigm. Using methods of qualitative analysis of dynamical systems, complemented by numerical solutions of the evolution equations, we study the late-time behavior of our model. We show that contrary to the uncoupled scenario, the coupled phantom model admits accelerated scaling solutions. However, they do not correspond to a final state of the Universe’s evolution and, therefore, cannot be used to solve the cosmological coincidence problem. Furthermore, we show that, for certain coupling parameter values, the total equation-of-state parameter’s asymptotic behavior is significantly changed when compared to the uncoupled scenario, allowing for solutions less phantom even for steeper potentials of the phantom scalar field. | eng |
| dc.identifier.doi | 10.1103/physrevd.110.063529 | |
| dc.identifier.eissn | 2470-0029 | |
| dc.identifier.issn | 2470-0010 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/28619 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | American Physical Society | |
| dc.relation.ispartof | Physical Review D | |
| dc.rights.uri | N/A | |
| dc.subject | Cosmology | |
| dc.subject | Dark energy | |
| dc.subject | Dark matter | |
| dc.subject | Evolution of the Universe | |
| dc.title | Coupled phantom cosmological model motivated by the warm inflationary paradigm | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.issue | 6 | |
| oaire.citation.startPage | 063529 | |
| oaire.citation.title | Physical Review D (particles, fields, gravitation, and cosmology) | |
| oaire.citation.volume | 110 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Sá | |
| person.givenName | Paulo | |
| person.identifier.ciencia-id | 4116-AE55-DC83 | |
| person.identifier.orcid | 0000-0003-4321-0801 | |
| person.identifier.rid | AAD-7568-2019 | |
| person.identifier.scopus-author-id | 7003787777 | |
| relation.isAuthorOfPublication | d9afc9c7-e997-4cab-b844-c42f7e54e3ab | |
| relation.isAuthorOfPublication.latestForDiscovery | d9afc9c7-e997-4cab-b844-c42f7e54e3ab |