Friedmann Robertson-Walker model in generalised metric space-time with weak anisotropy

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dc.creatorStavrinos, P. C.
dc.creatorKouretsis, A. P.
dc.creatorStathakopoulos, M.
dc.date2006-12-24
dc.date2007-10-22
dc.date.accessioned2026-07-07T11:43:07Z
dc.date.available2026-07-07T11:43:07Z
dc.descriptionA generalized model of space-time is given, taking into consideration the anisotropic structure of fields which are depended on the position and the direction (velocity).In this framework a generalized FRW-metric the Raychaudhouri and Friedmann equations are studied.A long range vector field of cosmological origin is considered in relation to the physical geometry of space-time in which Cartan connection has a fundamental role.The generalised Friedmann equations are produced including anisotropic terms.The variation of anisotropy $z_t$ is expressed in terms of the Cartan torsion tensor of the Finslerian space-time.A possible estimation of the anisotropic parameter $z_t$ can be achieved with the aid of the de-Sitter model of the empty flat universe with weak anisotropy. Finally a physical generalisation for the model of inflation is also studied.
dc.description21 pages- to appear in GRG
dc.identifierhttps://arxiv.org/abs/gr-qc/0612157
dc.identifierhttp://arxiv.org/abs/gr-qc/0612157
dc.identifierGen.Rel.Grav.40:1403-1425,2008
dc.identifierdoi:10.1007/s10714-007-0540-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201126
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleFriedmann Robertson-Walker model in generalised metric space-time with weak anisotropy
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