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dc.contributor.authorPeralta-Ramos, J.-
dc.contributor.authorCalzetta, E.-
dc.date.accessioned2013-09-30T18:54:25Z-
dc.date.accessioned2014-05-20T14:09:51Z-
dc.date.accessioned2016-10-25T17:19:11Z-
dc.date.available2013-09-30T18:54:25Z-
dc.date.available2014-05-20T14:09:51Z-
dc.date.available2016-10-25T17:19:11Z-
dc.date.issued2012-02-01-
dc.identifierhttp://dx.doi.org/10.1007/JHEP02(2012)085-
dc.identifier.citationJournal of High Energy Physics. New York: Springer, n. 2, p. 25, 2012.-
dc.identifier.issn1126-6708-
dc.identifier.urihttp://hdl.handle.net/11449/24222-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/24222-
dc.description.abstractWithin the framework of relativistic fluctuating hydrodynamics we compute the contribution of thermal fluctuations to the effective infrared shear viscosity of a conformal fluid, focusing on quadratic (in fluctuations), second order (in velocity gradients) terms in the conservation equations. Our approach is based on the separation of hydrodynamic fields in soft and ultrasoft sectors, in which the effective shear viscosity arises due to the action of the soft modes on the evolution of the ultrasoft ones. We find that for a strongly coupled fluid with small shear viscosity-to-entropy ratio eta/s the contribution of thermal fluctuations to the effective shear viscosity is small but significant. Using realistic estimates for the strongly coupled quark-gluon plasma created in heavy ion collisions, we find that for eta/s close to the AdS/CFT lower bound 1/(4 pi) the correction is positive and at most amounts to 10% in the temperature range 200-300MeV, whereas for larger values eta/s similar to 2/(4 pi) the correction is negligible. For weakly coupled theories the correction is very small even for eta/s = 0.08 and can be neglected.en
dc.description.sponsorshipAgencia Nacional de Promoción Científica y Tecnológica (ANPCYT)-
dc.description.sponsorshipConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-
dc.description.sponsorshipUBA (Argentina)-
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.format.extent25-
dc.language.isoeng-
dc.publisherSpringer-
dc.sourceWeb of Science-
dc.subjectPhenomenological Modelsen
dc.subjectQuantum Dissipative Systemsen
dc.titleShear viscosity from thermal fluctuations in relativistic conformal fluid dynamicsen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionFCEyN UBA-
dc.contributor.institutionIFIBA CONICET-
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 São Paulo, Brazil-
dc.description.affiliationFCEyN UBA, Dept Fis, RA-1428 Buenos Aires, DF, Argentina-
dc.description.affiliationIFIBA CONICET, RA-1428 Buenos Aires, DF, Argentina-
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 São Paulo, Brazil-
dc.description.sponsorshipIdUBA (Argentina): UBACYT X032-
dc.identifier.doi10.1007/JHEP02(2012)085-
dc.identifier.wosWOS:000301453400005-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of High Energy Physics-
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