Holographic bulk viscosity: GPR vs EO

Recently Eling and Oz (EO) proposed a formula for the holographic bulk viscosity, in arXiv:1103.1657, derived from the null horizon focusing equation. This formula seems different from that obtained earlier by Gubser, Pufu and Rocha (GPR) in arXiv:0806.0407 calculated from the IR limit of the two-po...

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Detalles Bibliográficos
Autores principales: Buchel, Alex, Gursoy, Umut, Kiritsis, Elias
Lenguaje:eng
Publicado: 2011
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1007/JHEP09(2011)095
http://cds.cern.ch/record/1344185
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author Buchel, Alex
Gursoy, Umut
Kiritsis, Elias
author_facet Buchel, Alex
Gursoy, Umut
Kiritsis, Elias
author_sort Buchel, Alex
collection CERN
description Recently Eling and Oz (EO) proposed a formula for the holographic bulk viscosity, in arXiv:1103.1657, derived from the null horizon focusing equation. This formula seems different from that obtained earlier by Gubser, Pufu and Rocha (GPR) in arXiv:0806.0407 calculated from the IR limit of the two-point function of the trace of the stress tensor. The two were shown to agree only for some simple scaling cases. We point out that the two formulae agree in two non-trivial holographic theories describing RG flows. The first is the strongly coupled N=2* gauge theory plasma. The second is the semi-phenomenological model of Improved Holographic QCD.
id cern-1344185
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-13441852023-03-14T17:33:54Zdoi:10.1007/JHEP09(2011)095http://cds.cern.ch/record/1344185engBuchel, AlexGursoy, UmutKiritsis, EliasHolographic bulk viscosity: GPR vs EOParticle Physics - TheoryRecently Eling and Oz (EO) proposed a formula for the holographic bulk viscosity, in arXiv:1103.1657, derived from the null horizon focusing equation. This formula seems different from that obtained earlier by Gubser, Pufu and Rocha (GPR) in arXiv:0806.0407 calculated from the IR limit of the two-point function of the trace of the stress tensor. The two were shown to agree only for some simple scaling cases. We point out that the two formulae agree in two non-trivial holographic theories describing RG flows. The first is the strongly coupled N=2* gauge theory plasma. The second is the semi-phenomenological model of Improved Holographic QCD.Recently Eling and Oz (EO) proposed a formula for the holographic bulk viscosity, in arXiv:1103.1657, derived from the null horizon focusing equation. This formula seems different from that obtained earlier by Gubser, Pufu and Rocha (GPR) in arXiv:0806.0407 calculated from the IR limit of the two-point function of the trace of the stress tensor. The two were shown to agree only for some simple scaling cases. We point out that the two formulae agree in two non-trivial holographic theories describing RG flows. The first is the strongly coupled N=2* gauge theory plasma. The second is the semi-phenomenological model of Improved Holographic QCD.arXiv:1104.2058UWO-TH-11-5CCTP-2011-12CERN-PH-TH-2011-074CERN-PH-TH-2011-074oai:cds.cern.ch:13441852011-04-13
spellingShingle Particle Physics - Theory
Buchel, Alex
Gursoy, Umut
Kiritsis, Elias
Holographic bulk viscosity: GPR vs EO
title Holographic bulk viscosity: GPR vs EO
title_full Holographic bulk viscosity: GPR vs EO
title_fullStr Holographic bulk viscosity: GPR vs EO
title_full_unstemmed Holographic bulk viscosity: GPR vs EO
title_short Holographic bulk viscosity: GPR vs EO
title_sort holographic bulk viscosity: gpr vs eo
topic Particle Physics - Theory
url https://dx.doi.org/10.1007/JHEP09(2011)095
http://cds.cern.ch/record/1344185
work_keys_str_mv AT buchelalex holographicbulkviscositygprvseo
AT gursoyumut holographicbulkviscositygprvseo
AT kiritsiselias holographicbulkviscositygprvseo

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