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Article: Rotational perturbations in Neveu-Schwarz–Neveu-Schwarz string cosmology

TitleRotational perturbations in Neveu-Schwarz–Neveu-Schwarz string cosmology
Authors
KeywordsPhysics - nuclear physics
Issue Date2001
PublisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.org
Citation
Physical Review D (Particles and Fields), 2001, v. 63 n. 10, p. 104013:1-10 How to Cite?
AbstractFirst order rotational perturbations of the flat Friedmann-Robertson-Walker metric are considered in the framework of four dimensional Neveu-Schwarz–Neveu-Schwarz string cosmological models coupled with dilaton and axion fields. For the H field we use the solitonic ansatz, assuming that it is a function of time only. The decay rate of rotation depends mainly upon the dilaton field potential U. The equation for rotation imposes strong limitations upon the functional form of U, restricting the allowed potentials to two: the trivial case U=0 and a generalized exponential type potential. In these two models the metric rotation function can be obtained in an exact analytic form in both Einstein and string frames. In the potential-free case the decay of rotational perturbations is governed by an arbitrary function of time while in the presence of a potential the rotation tends rapidly to zero in both Einstein and string frames.
Persistent Identifierhttp://hdl.handle.net/10722/43326
ISSN
2004 Impact Factor: 5.156
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, CMen_HK
dc.contributor.authorHarko, TCen_HK
dc.contributor.authorMak, MKen_HK
dc.date.accessioned2007-03-23T04:43:38Z-
dc.date.available2007-03-23T04:43:38Z-
dc.date.issued2001en_HK
dc.identifier.citationPhysical Review D (Particles and Fields), 2001, v. 63 n. 10, p. 104013:1-10en_HK
dc.identifier.issn0556-2821en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43326-
dc.description.abstractFirst order rotational perturbations of the flat Friedmann-Robertson-Walker metric are considered in the framework of four dimensional Neveu-Schwarz–Neveu-Schwarz string cosmological models coupled with dilaton and axion fields. For the H field we use the solitonic ansatz, assuming that it is a function of time only. The decay rate of rotation depends mainly upon the dilaton field potential U. The equation for rotation imposes strong limitations upon the functional form of U, restricting the allowed potentials to two: the trivial case U=0 and a generalized exponential type potential. In these two models the metric rotation function can be obtained in an exact analytic form in both Einstein and string frames. In the potential-free case the decay of rotational perturbations is governed by an arbitrary function of time while in the presence of a potential the rotation tends rapidly to zero in both Einstein and string frames.en_HK
dc.format.extent138415 bytes-
dc.format.extent122136 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/pdf-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.orgen_HK
dc.rightsPhysical Review D (Particles and Fields). Copyright © American Physical Society.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysics - nuclear physicsen_HK
dc.titleRotational perturbations in Neveu-Schwarz–Neveu-Schwarz string cosmologyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0556-2821&volume=63&issue=10&spage=104013:1&epage=10&date=2001&atitle=Rotational+perturbations+in+Neveu-Schwarz–Neveu-Schwarz+string+cosmologyen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevD.63.104013en_HK
dc.identifier.scopuseid_2-s2.0-0034899554-
dc.identifier.isiWOS:000168830400035-

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