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dc.contributor.authorRamirez, Juaneng
dc.contributor.authorKopeikin, Sergei M.eng
dc.date.issued2002eng
dc.description.abstractA decoupled system of hyperbolic partial differential equations for linear perturbations around any spatially flat FRW universe is obtained for a wide class of perturbations. The considered perturbing energy momentum-tensors can be expressed as the sum of the perturbation of a minimally coupled scalar field plus an arbitrary (weak) energy-momentum tensor which is covariantly conserved with respect to the background. The key ingredient in obtaining the decoupling of the equations is the introduction of a new covariant gauge which plays a similar role as harmonic gauge does for perturbations around Minkowski space-time. The case of universes satysfying a linear equation of state is discussed in particular, and closed analytic expressions for the retarded Green's functions solving the de Sitter, dust and radiation dominated cases are given.eng
dc.identifier.citationarXiv:gr-qc/0110071v2eng
dc.identifier.urihttp://hdl.handle.net/10355/6978eng
dc.languageEnglisheng
dc.publisherarXiveng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.source.urihttp://arxiv.org/PS_cache/gr-qc/pdf/0110/0110071v2.pdfeng
dc.subjectgeneral relativityeng
dc.subjectquantum cosmologyeng
dc.subject.lcshCosmology -- Mathematicseng
dc.titleA decoupled system of hyperbolic equations for linearized cosmological perturbationseng
dc.typeArticleeng


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