Energy-momentum tensor correlators and viscosity

Abstract

Collective flow has been observed in heavy ion collisions, with a large anisotropic component, and ideal hydrodynamic calculations had significant successful in describing the distribution of produced particles at the RHIC experiments. In order to account for this near ideal fluid behavior, the shear and bulk viscosity of the quark gluon plasma (QGP) must be computed from first principles in a regime where the QGP is not weakly coupled. In this talk I describe recent progress in computing energy-momentum tensor correlators on the lattice from which the viscosities can be extracted via Kubo formulas. I also show how to cumulate information from several channels, including at non-vanishing spatial momentum, in order to best constrain the viscosities. These methods should soon yield predictions at the higher temperatures that will be explored at the LHC experiments.

Plenary talk at 26th International Symposium on Lattice Field Theory (Lattice 2008), Williamsburg, Virginia, USA, July 14 - 19, 2008

References in corpus (12)

• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• A calculation of the bulk viscosity in SU(3) gluodynamics
• Simulating elliptic flow with viscous hydrodynamics
• Suppression of elliptic flow in a minimally viscous quark-gluon plasma
• Universal properties of bulk viscosity near the QCD phase transition
• Thermal spectral functions of strongly coupled N=4 supersymmetric Yang-Mills theory
• Energy-momentum tensor correlators and spectral functions
• Glueball matrix elements: a lattice calculation and applications
• Properties of the Quark Gluon Plasma: A lattice perspective
• Density, short-range order and the quark-gluon plasma
• Viscous Properties of Strongly Interacting Matter at High Temperature

Cited by in corpus (6)

• Improved Holographic QCD
• Transport properties of the quark-gluon plasma from lattice QCD
• Implications of Poincare symmetry for thermal field theories in finite-volume
• Deconfinement and quark-gluon plasma
• The second order hydrodynamic transport coefficient $\kappa$ for the gluon plasma from the lattice
• A Cornucopia of Experiment at RHIC