Bulk viscosity of strongly coupled plasmas with holographic duals

Steven S. Gubser; Silviu S. Pufu; Fábio D. Rocha

doi:10.1088/1126-6708/2008/08/085

Bulk viscosity of strongly coupled plasmas with holographic duals

Steven S. Gubser, Silviu S. Pufu, Fábio D. Rocha

Physics

Research output: Contribution to journal › Article › peer-review

117 Scopus citations

Abstract

We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in [1].

Original language	English (US)
Article number	085
Journal	Journal of High Energy Physics
Volume	2008
Issue number	8
DOIs	https://doi.org/10.1088/1126-6708/2008/08/085
State	Published - Aug 1 2008

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Keywords

Black holes in string theory
Gauge-gravity correspondence

Access to Document

10.1088/1126-6708/2008/08/085

Cite this

@article{5cc53577292e4efda14526c4849bf578,

title = "Bulk viscosity of strongly coupled plasmas with holographic duals",

abstract = "We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in [1].",

keywords = "Black holes in string theory, Gauge-gravity correspondence",

author = "Gubser, {Steven S.} and Pufu, {Silviu S.} and Rocha, {F{\'a}bio D.}",

year = "2008",

month = aug,

day = "1",

doi = "10.1088/1126-6708/2008/08/085",

language = "English (US)",

volume = "2008",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "8",

}

TY - JOUR

T1 - Bulk viscosity of strongly coupled plasmas with holographic duals

AU - Gubser, Steven S.

AU - Pufu, Silviu S.

AU - Rocha, Fábio D.

PY - 2008/8/1

Y1 - 2008/8/1

N2 - We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in [1].

AB - We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in [1].

KW - Black holes in string theory

KW - Gauge-gravity correspondence

UR - http://www.scopus.com/inward/record.url?scp=54749109860&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=54749109860&partnerID=8YFLogxK

U2 - 10.1088/1126-6708/2008/08/085

DO - 10.1088/1126-6708/2008/08/085

M3 - Article

AN - SCOPUS:54749109860

SN - 1126-6708

VL - 2008

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 085

ER -

Bulk viscosity of strongly coupled plasmas with holographic duals

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this