Anisotropic spacetimes in homogeneous string cosmology

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dc.contributor.author Batakis, NA en
dc.contributor.author Kehagias, AA en
dc.date.accessioned 2014-03-01T01:10:49Z
dc.date.available 2014-03-01T01:10:49Z
dc.date.issued 1995 en
dc.identifier.issn 0550-3213 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/11458
dc.subject Cosmological Constant en
dc.subject Early Universe en
dc.subject Effective Action en
dc.subject General Relativity en
dc.subject General Solution en
dc.subject Leading Order en
dc.subject.classification Physics, Particles & Fields en
dc.subject.other GAUGED WZW MODELS en
dc.subject.other EXPANDING UNIVERSE en
dc.subject.other DUALITY en
dc.subject.other BACKGROUNDS en
dc.subject.other DIMENSIONS en
dc.subject.other SYMMETRIES en
dc.subject.other INFLATION en
dc.title Anisotropic spacetimes in homogeneous string cosmology en
heal.type journalArticle en
heal.identifier.primary 10.1016/0550-3213(95)00249-R en
heal.identifier.secondary http://dx.doi.org/10.1016/0550-3213(95)00249-R en
heal.language English en
heal.publicationDate 1995 en
heal.abstract The dynamics of the early universe may have been profoundly influenced by spatial anisotropies. A search for such backgrounds in the context of string cosmology has uncovered the existence of an entire class of 4D spatially homogeneous but not necessarily isotropic spacetimes, analogous to the class of Bianchi-type models in general relativity. Leading-order solutions with vanishing cosmological constant but with non-vanishing dilaton and antisymmetric field are explicitly found for all types. This is a new class of solutions, whose isotropy limits reproduce all known and, further, all possible FRW-type of models in the string effective-action context considered. There is always an initial singularity and no inflation. Other features of the general solutions, including their behavior under abelian T duality are also discussed. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Nuclear Physics B en
dc.identifier.doi 10.1016/0550-3213(95)00249-R en
dc.identifier.isi ISI:A1995RR93600013 en
dc.identifier.volume 449 en
dc.identifier.issue 1-2 en
dc.identifier.spage 248 en
dc.identifier.epage 264 en

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