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Article: Inflation and late-time acceleration in braneworld cosmological models with varying brane tension

TitleInflation and late-time acceleration in braneworld cosmological models with varying brane tension
Authors
Issue Date2010
PublisherSpringer. The Journal's web site is located at http://epjc.edpsciences.org
Citation
European Physical Journal C, 2010, v. 68 n. 1, p. 241-253 How to Cite?
AbstractBraneworld models with variable brane tension λ introduce a new degree of freedom that allows for evolving gravitational and cosmological constants, the latter being a natural candidate for dark energy. We consider a thermodynamic interpretation of the varying brane tension models, by showing that the field equations with variable λ can be interpreted as describing matter creation in a cosmological framework. The particle creation rate is determined by the variation rate of the brane tension, as well as by the brane-bulk energy-matter transfer rate. We investigate the effect of a variable brane tension on the cosmological evolution of the Universe, in the framework of a particular model in which the brane tension is an exponentially dependent function of the scale factor. The resulting cosmology shows the presence of an initial inflationary expansion, followed by a decelerating phase, and by a smooth transition towards a late accelerated de Sitter type expansion. The varying brane tension is also responsible for the generation of the matter in the Universe (reheating period). The physical constraints on the model parameters, resulting from the observational cosmological data, are also investigated. © 2010 Springer-Verlag / Società Italiana di Fisica.
Persistent Identifierhttp://hdl.handle.net/10722/91775
ISSN
2015 Impact Factor: 4.912
2015 SCImago Journal Rankings: 0.724
ISI Accession Number ID
Funding AgencyGrant Number
RGC of the Government of the Hong Kong SARHKU 701808P
Funding Information:

This work is supported by the RGC grant HKU 701808P of the Government of the Hong Kong SAR.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorWong, KCen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-09-17T10:26:15Z-
dc.date.available2010-09-17T10:26:15Z-
dc.date.issued2010en_HK
dc.identifier.citationEuropean Physical Journal C, 2010, v. 68 n. 1, p. 241-253en_HK
dc.identifier.issn1434-6044en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91775-
dc.description.abstractBraneworld models with variable brane tension λ introduce a new degree of freedom that allows for evolving gravitational and cosmological constants, the latter being a natural candidate for dark energy. We consider a thermodynamic interpretation of the varying brane tension models, by showing that the field equations with variable λ can be interpreted as describing matter creation in a cosmological framework. The particle creation rate is determined by the variation rate of the brane tension, as well as by the brane-bulk energy-matter transfer rate. We investigate the effect of a variable brane tension on the cosmological evolution of the Universe, in the framework of a particular model in which the brane tension is an exponentially dependent function of the scale factor. The resulting cosmology shows the presence of an initial inflationary expansion, followed by a decelerating phase, and by a smooth transition towards a late accelerated de Sitter type expansion. The varying brane tension is also responsible for the generation of the matter in the Universe (reheating period). The physical constraints on the model parameters, resulting from the observational cosmological data, are also investigated. © 2010 Springer-Verlag / Società Italiana di Fisica.en_HK
dc.languageengen_HK
dc.publisherSpringer. The Journal's web site is located at http://epjc.edpsciences.orgen_HK
dc.relation.ispartofEuropean Physical Journal Cen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleInflation and late-time acceleration in braneworld cosmological models with varying brane tensionen_HK
dc.typeArticleen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1140/epjc/s10052-010-1348-9en_HK
dc.identifier.scopuseid_2-s2.0-77954538186en_HK
dc.identifier.hkuros180318-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77954538186&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume68en_HK
dc.identifier.issue1en_HK
dc.identifier.spage241en_HK
dc.identifier.epage253en_HK
dc.identifier.eissn1434-6052-
dc.identifier.isiWOS:000279843400017-
dc.publisher.placeGermanyen_HK
dc.relation.projectBrane world cosmology: post-inflationary reheating and gravitational lensing-
dc.identifier.scopusauthoridWong, KC=36085523500en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK
dc.identifier.citeulike7372580-

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