Study of shear viscosity of SU(2)-gluodynamics within lattice simulation

A bstract This paper is devoted to the study of two-point correlation function of the energy-momentum tensor 〈 T 12 T 12 〉 for SU(2)-gluodynamics within lattice simulation of QCD. Using multilevel algorithm we carried out the measurement of the correlation function at the temperature T /T c ≃ 1 . 2....

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Veröffentlicht in:	The journal of high energy physics 2015-09, Vol.2015 (9), p.1-11, Article 82
Hauptverfasser:	Astrakhantsev, N.Yu, Braguta, V.V., Kotov, A.Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Asymptotic properties Classical and Quantum Gravitation Computer simulation Correlation analysis Elementary Particles Entropy Lattices Physics Physics and Astronomy Quantum chromodynamics Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Theoretical Physics Relativity Theory Shear viscosity String Theory
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Beschreibung
Zusammenfassung:	A bstract This paper is devoted to the study of two-point correlation function of the energy-momentum tensor 〈 T 12 T 12 〉 for SU(2)-gluodynamics within lattice simulation of QCD. Using multilevel algorithm we carried out the measurement of the correlation function at the temperature T /T c ≃ 1 . 2. It is shown that lattice data can be described by spec-tral functions which interpolate between hydrodynamics at low frequencies and asymptotic freedom at high frequencies. The results of the study of spectral functions allowed us to estimate the ratio of shear viscosity to the entropy density η/s = 0 . 134 ± 0 . 057.
ISSN:	1029-8479 1029-8479
DOI:	10.1007/JHEP09(2015)082