Mostra el registre d'ítem simple
The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology
dc.contributor.author | Haro Cases, Jaume |
dc.contributor.author | Amorós Torrent, Jaume |
dc.contributor.author | Aresté Saló, Llibert |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Matemàtiques |
dc.date.accessioned | 2017-10-25T11:35:18Z |
dc.date.available | 2018-09-01T00:30:27Z |
dc.date.issued | 2017-09-01 |
dc.identifier.citation | Haro, J., Amoros, J., Aresté, L. The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology. "Journal of cosmology and astroparticle physics", 1 Setembre 2017, vol. 2017, núm. 9. |
dc.identifier.issn | 1475-7516 |
dc.identifier.uri | http://hdl.handle.net/2117/109151 |
dc.description.abstract | We will perform a detailed study of the matter-ekpyrotic bouncing scenario in Loop Quantum Cosmology using the methods of the dynamical systems theory. We will show that when the background is driven by a single scalar field, at very late times, in the contracting phase, all orbits depict a matter dominated Universe, which evolves to an ekpyrotic phase. After the bounce the Universe enters in the expanding phase, where the orbits leave the ekpyrotic regime going to a kination (also named deflationary) regime. Moreover, this scenario supports the production of heavy massive particles conformally coupled with gravity, which reheats the universe at temperatures compatible with the nucleosynthesis bounds and also the production of massless particles non-conformally coupled with gravity leading to very high reheating temperatures but ensuring the nucleosynthesis success. Dealing with cosmological perturbations, these background dynamics produce a nearly scale invariant power spectrum for the modes that leave the Hubble radius, in the contracting phase, when the Universe is quasi-matter dominated, whose spectral index and corresponding running is compatible with the recent experimental data obtained by PLANCK's team. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Matemàtiques i estadística |
dc.subject.lcsh | Cosmology |
dc.subject.lcsh | Relativity |
dc.subject.other | alternatives to inflation |
dc.subject.other | cosmic singularity |
dc.subject.other | power spectrum |
dc.subject.other | quantum cosmology |
dc.title | The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology |
dc.type | Article |
dc.subject.lemac | Cosmologia |
dc.subject.lemac | Relativitat (Física) |
dc.subject.lemac | Quàntums, Teoria dels |
dc.contributor.group | Universitat Politècnica de Catalunya. EDP - Equacions en Derivades Parcials i Aplicacions |
dc.contributor.group | Universitat Politècnica de Catalunya. GEOMVAP - Geometria de Varietats i Aplicacions |
dc.identifier.doi | 10.1088/1475-7516/2017/09/002 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://iopscience.iop.org/article/10.1088/1475-7516/2017/09/002/meta |
dc.rights.access | Open Access |
local.identifier.drac | 21547936 |
dc.description.version | Postprint (published version) |
local.citation.author | Haro, J.; Amoros, J.; Aresté, L. |
local.citation.publicationName | Journal of cosmology and astroparticle physics |
local.citation.volume | 2017 |
local.citation.number | 9 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [184]
-
Articles de revista [91]
-
Articles de revista [3.267]