Energy-momentum tensor correlators and viscosity

@inproceedings{Meyer2008EnergymomentumTC,
  title={Energy-momentum tensor correlators and viscosity},
  author={Harvey B. Meyer},
  year={2008}
}
  • H. Meyer
  • Published 30 September 2008
  • Physics
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… 

Figures from this paper

The second order hydrodynamic transport coefficient κ for the gluon plasma from the lattice
A bstractThe quark gluon plasma produced in heavy ion collisions behaves like an almost ideal fluid described by viscous hydrodynamics with a number of transport coefficients. The second order
Study of shear viscosity of SU(2)-gluodynamics within lattice simulation
A bstractThis paper is devoted to the study of two-point correlation function of the energy-momentum tensor 〈T12T12〉 for SU(2)-gluodynamics within lattice simulation of QCD. Using multilevel
Frequency and wave number dependence of the shear correlator in strongly coupled hot Yang-Mills theory
We use AdS/QCD duality to compute the finite temperature Green's functionG(omega,k;T) of the shear operator T_12 for all omega,k in hot Yang-Millstheory. The goal is to assess how the existence of
Polarised correlators at finite temperature
QCD undergoes a deconfining transition at high temperature to a "quark-gluon plasma" phase where hadrons may become unbound. In this work, meson correlation functions at non-zero momentum are studied
Deconfinement and quark-gluon plasma
The theory of confinement and deconfinement is discussed as based on the properties of the QCD vacuum. The latter are described by field correlators of color-electric and color-magnetic fields in the
Cutoff effects on energy-momentum tensor correlators in lattice gauge theory
We investigate the discretization errors affecting correlators of the energy-momentum tensor Tμν at finite temperature in SU(Nc) gauge theory with the Wilson action and two different discretizations
Improved Holographic QCD
We provide a review to holographic models based on Einstein-dilaton gravity with a potential in five dimensions. Such theories, for a judicious choice of potential are very close to the physics of
Properties of mesons and quarks under extreme conditions from Gauge-Gravity duality
This thesis is concerned with the properties of mesons and quarks which live in the strongly coupled plasma of certain gauge theories which are similar to QCD. To study these plasmas we exploit gauge
Temperature dependence of shear viscosity of SU(3)-gluodynamics within lattice simulation
A bstractIn this paper we study the SU(3)-gluodynamics shear viscosity temperature dependence on the lattice. To do so, we measure the correlation functions of the energy-momentum tensor in the range
...
...

References

SHOWING 1-10 OF 63 REFERENCES
Energy-momentum tensor correlators and spectral functions
We calculate the thermal Euclidean correlators and the spectral functions of the energy-momentum tensor for pure gauge theories, including at non-zero spatial momentum, at leading order in
Flow at the SPS and RHIC as a quark-gluon plasma signature.
TLDR
With the EOS fixed from SPS data, predictions at RHIC are quantified where the quark-gluon plasma (QGP) pressure is expected to drive additional radial and elliptic flows and the strong elliptic flow observed in the first RHIC measurements does not conclusively signal this nascent QGP pressure.
Viscosity information from relativistic nuclear collisions: how perfect is the fluid observed at RHIC?
TLDR
Relativistic viscous hydrodynamic fits to Brookhaven Rel ativistic Heavy Ion Collider data on the centrality dependence of multiplicity, transverse, and elliptic flow for square root s = 200 GeV Au+Au collisions seem to favor a much smaller viscosity over entropy ratio, below the bound from the anti-de Sitter conformal field theory conjecture.
Transport coefficients of a gluon plasma.
TLDR
The results show that the ratio of the shear Viscosity to the entropy is less than one and the bulk viscosity is consistent with zero in the region 1.4 < or = T/T(c), where a new state of matter is being pursued in BNL RHIC experiments.
Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC
A new set of equations for relativistic viscous hydrodynamics that captures both weak-coupling and strong-coupling physics to second order in gradients has been developed recently. We apply this
A calculation of the shear viscosity in SU(3) gluodynamics
We perform a lattice Monte-Carlo calculation of the two-point functions of the energy-momentum tensor at finite temperature in the SU(3) gauge theory. Unprecedented precision is obtained thanks to a
Glueball matrix elements: a lattice calculation and applications
We compute the matrix elements of the energy-momentum tensor between glueball states and the vacuum in SU(3) lattice gauge theory and extrapolate them to the continuum. These matrix elements may play
TRANSPORT COEFFICIENTS IN HOT QCD
I give a physical explanation of what shear viscosity is, and what physics determines its value. Then I explain why determining the shear viscosity of the Quark-Gluon Plasma is interesting. I outline
Viscous Properties of Strongly Interacting Matter at High Temperature
Substantial collective flow is observed in collisions between large nuclei at high energy, and the data are well-reproduced by perfect fluid dynamics. In a separate development, calculation of the
...
...