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http://hdl.handle.net/2445/12308
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DC Field | Value | Language |
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dc.contributor.author | Campos, Antonio | cat |
dc.contributor.author | Calzetta, Esteban A., 1958- | cat |
dc.contributor.author | Verdaguer Oms, Enric, 1950- | cat |
dc.date.accessioned | 2010-05-06T08:20:35Z | - |
dc.date.available | 2010-05-06T08:20:35Z | - |
dc.date.issued | 1997 | cat |
dc.identifier.issn | 0556-2821 | ca |
dc.identifier.uri | http://hdl.handle.net/2445/12308 | - |
dc.description.abstract | We consider the classical stochastic fluctuations of spacetime geometry induced by quantum fluctuations of massless nonconformal matter fields in the early Universe. To this end, we supplement the stress-energy tensor of these fields with a stochastic part, which is computed along the lines of the Feynman-Vernon and Schwinger-Keldysh techniques; the Einstein equation is therefore upgraded to a so-called Einstein-Langevin equation. We consider in some detail the conformal fluctuations of flat spacetime and the fluctuations of the scale factor in a simple cosmological model introduced by Hartle, which consists of a spatially flat isotropic cosmology driven by radiation and dust. | eng |
dc.format.extent | 10 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.56.2163 | cat |
dc.relation.ispartof | Physical Review D, 1997, vol. 56, núm. 4, p. 2163-2172 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevD.56.2163 | - |
dc.rights | (c) The American Physical Society, 1997 | eng |
dc.source | Articles publicats en revistes (Física de la Matèria Condensada) | - |
dc.subject.classification | Relativitat (Física) | cat |
dc.subject.classification | Gravitació | cat |
dc.subject.classification | Física estadística | cat |
dc.subject.classification | Teoria quàntica | cat |
dc.subject.classification | Cosmologia | cat |
dc.subject.other | Relativity (Physics) | eng |
dc.subject.other | Gravitation | eng |
dc.subject.other | Cosmology | eng |
dc.subject.other | Statistical physics | eng |
dc.subject.other | Quantum theory | eng |
dc.title | Stochastic semiclassical cosmological models | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 115393 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
Files in This Item:
File | Description | Size | Format | |
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115393.pdf | 208.75 kB | Adobe PDF | View/Open |
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