Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Nonzero Temperature and Density
Temperature dependence of shear viscosity in $SU(3)$-gluodynamics
V. Braguta,* N. Astrakhantsev, A.Y. Kotov
*corresponding author
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Pre-published on: 2017 February 01
Published on: 2017 March 24
Abstract
This report is devoted to the study of temperature dependence of shear viscosity in $SU(3)$-gluodynamics. To calculate shear viscosity we measured the correlation function of the energy-momentum tensor $T_{12}T_{12}$ for a set of temperatures in the region $T/T_c \in (0.9, 1.5)$. The measurements were carried out using multilevel algorithm which considerably improves the accuracy of the data. For determination of the shear viscosity two methods were used: physically motivated ansatz and non-parametrical Backus-Gilbert method. Both methods give consistent results. The calculation allows to determine temperature dependence of the ratio of shear viscosity to the entropy density $\eta/s$.
DOI: https://doi.org/10.22323/1.256.0032
Open Access