Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics

Autores
Peralta Ramos, Jeronimo; Calzetta, Esteban Adolfo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Within 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/(4pi) the correction
is positive and at most amounts to 10% in the temperature range 200?300 MeV, whereas for larger values eta/s ∼ 2/(4pi) the correction is negligible. For weakly coupled theories the correction is very small even for eta/s = 0.08 and can be neglected.
Fil: Peralta Ramos, Jeronimo. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Calzetta, Esteban Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Materia
SHEAR VISCOSITY
THERMAL FLUCTUATIONS
CONFORMAL FLUID DYNAMICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/268036
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/268036
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamicsPeralta Ramos, JeronimoCalzetta, Esteban AdolfoSHEAR VISCOSITYTHERMAL FLUCTUATIONSCONFORMAL FLUID DYNAMICShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Within 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/(4pi) the correction<br />is positive and at most amounts to 10% in the temperature range 200?300 MeV, whereas for larger values eta/s ∼ 2/(4pi) the correction is negligible. For weakly coupled theories the correction is very small even for eta/s = 0.08 and can be neglected.Fil: Peralta Ramos, Jeronimo. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Calzetta, Esteban Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaSpringer2012-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268036Peralta Ramos, Jeronimo; Calzetta, Esteban Adolfo; Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics; Springer; Journal of High Energy Physics; 2012; 2; 2-2012; 1-251126-6708CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/JHEP02(2012)085info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP02(2012)085info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:36:49Zoai:ri.conicet.gov.ar:11336/268036instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:36:50.116CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
title Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
spellingShingle Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
Peralta Ramos, Jeronimo
SHEAR VISCOSITY
THERMAL FLUCTUATIONS
CONFORMAL FLUID DYNAMICS
title_short Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
title_full Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
title_fullStr Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
title_full_unstemmed Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
title_sort Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics
dc.creator.none.fl_str_mv Peralta Ramos, Jeronimo
Calzetta, Esteban Adolfo
author Peralta Ramos, Jeronimo
author_facet Peralta Ramos, Jeronimo
Calzetta, Esteban Adolfo
author_role author
author2 Calzetta, Esteban Adolfo
author2_role author
dc.subject.none.fl_str_mv SHEAR VISCOSITY
THERMAL FLUCTUATIONS
CONFORMAL FLUID DYNAMICS
topic SHEAR VISCOSITY
THERMAL FLUCTUATIONS
CONFORMAL FLUID DYNAMICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Within 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/(4pi) the correction<br />is positive and at most amounts to 10% in the temperature range 200?300 MeV, whereas for larger values eta/s ∼ 2/(4pi) the correction is negligible. For weakly coupled theories the correction is very small even for eta/s = 0.08 and can be neglected.
Fil: Peralta Ramos, Jeronimo. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Calzetta, Esteban Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
description Within 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/(4pi) the correction<br />is positive and at most amounts to 10% in the temperature range 200?300 MeV, whereas for larger values eta/s ∼ 2/(4pi) the correction is negligible. For weakly coupled theories the correction is very small even for eta/s = 0.08 and can be neglected.
publishDate 2012
dc.date.none.fl_str_mv 2012-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268036
Peralta Ramos, Jeronimo; Calzetta, Esteban Adolfo; Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics; Springer; Journal of High Energy Physics; 2012; 2; 2-2012; 1-25
1126-6708
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268036
identifier_str_mv Peralta Ramos, Jeronimo; Calzetta, Esteban Adolfo; Shear viscosity from thermal fluctuations in relativistic conformal fluid dynamics; Springer; Journal of High Energy Physics; 2012; 2; 2-2012; 1-25
1126-6708
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/JHEP02(2012)085
info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP02(2012)085
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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