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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/268036
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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 Técnicas2025-09-29T10:06:55Zoai: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:34982025-09-29 10:06:55.893CONICET 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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1844613922975383552 |
score |
13.070432 |