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dc.contributor.author | Brizuela, David | - |
dc.contributor.author | Mena Marugán, Guillermo A. | - |
dc.contributor.author | Pawlowski, Tomasz | - |
dc.date.accessioned | 2010-05-19T11:29:57Z | - |
dc.date.available | 2010-05-19T11:29:57Z | - |
dc.date.issued | 2010-02-10 | - |
dc.identifier.citation | Classical and Quantum Gravity, 27 (5) 052001 (2010) | en_US |
dc.identifier.issn | 1361-6382 | - |
dc.identifier.uri | http://hdl.handle.net/10261/24490 | - |
dc.description | 8 pags. ; 2 figs. | en_US |
dc.description.abstract | The dynamics of an inhomogeneous universe is studied with the methods of loop quantum cosmology, via a so-called hybrid quantization, as an example of the quantization of vacuum cosmological spacetimes containing gravitational waves (Gowdy spacetimes). The analysis of this model with an infinite number of degrees of freedom, performed at the effective level, shows that (i) the initial Big Bang singularity is replaced (as in the case of homogeneous cosmological models) by a Big Bounce, joining deterministically two large universes, (ii) the universe size at the bounce is at least of the same order of magnitude as that of the background homogeneous universe and (iii) for each gravitational wave mode, the difference in amplitude at very early and very late times has a vanishing statistical average when the bounce dynamics is strongly dominated by the inhomogeneities, whereas this average is positive when the dynamics is in a near-vacuum regime, so that statistically the inhomogeneities are amplified. | en_US |
dc.description.sponsorship | The authors are grateful to J Cortez, L J Garay, J M Mart´ın-Garc´ıa and especially M Mart´ın- Benito. Thisworkwas supported by the Spanish MICINN Project FIS2008-06078-C03-03 and the Consolider-Ingenio 2010 Program CPAN (CSD2007-00042). DB acknowledges financial aid by the FPI Program of Madrid Regional Government, and TP by the I3P Program of CSIC (together with the ESF) and the Foundation for Polish Science grant Master. | en_US |
dc.format.extent | 200937 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | en_US |
dc.publisher | Institute of Physics Publishing | en_US |
dc.rights | closedAccess | en_US |
dc.subject | [PACS] Loop quantum gravity, quantum geometry, spin foams | en_US |
dc.subject | [PACS] Quantum cosmology | en_US |
dc.title | Big Bounce and inhomogeneities | en_US |
dc.type | artículo | en_US |
dc.identifier.doi | 10.1088/0264-9381/27/5/052001 | - |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.relation.publisherversion | http://dx.doi.org/ 10.1088/0264-9381/27/5/052001 | en_US |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
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