Color path-integral Monte-Carlo simulations of strongly coupled of quark-gluon plasma

20 May 2014, 16:30
2h
spectrum (darmstadtium)

spectrum

darmstadtium

Board: J-07
Poster Thermodynamics and Hadron Chemistry Poster session

Speaker

Prof. Vladimir Filinov (Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia)

Description

Based on the quasiparticle model of the quark-gluon plasma (QGP), a color quantum path-integral Monte-Carlo (PIMC) method for calculation of thermodynamic properties and -- closely related to the latter -- a Wigner dynamics method for calculation of transport properties of the QGP are formulated. The QGP partition function is presented in the form of a color path integral with a new relativistic measure instead of the Gaussian one traditionally used in the Feynman-Wiener path integrals. A procedure of sampling color variables according to the SU(3) group Haar measure is developed for integration over the color variable. It is shown that the PIMC method is able to reproduce the lattice QCD equation of state at zero baryon chemical potential at realistic model parameters (i.e. quasiparticle masses and coupling constant) and also yields valuable insight into the internal structure of the QGP. Our results indicate that the QGP reveals quantum liquid-like rather than gas-like properties up to the highest considered temperature of 525 MeV. The pair distribution functions clearly reflect the existence of gluon-gluon bound states, i.e. glueballs, at temperatures just above the phase transition, while meson-like bound states are not found. The calculated self-diffusion coefficient agrees well with some estimates of the heavy-quark diffusion constant available from recent lattice data and also with an analysis of heavy-quark quenching in experiments on ultrarelativistic heavy ion collisions, however, appreciably exceeds other estimates. The lattice and heavy-quark-quenching results on the heavy-quark diffusion are still rather diverse. The obtained results for the shear viscosity are in the range of those deduced from an analysis of the experimental elliptic flow in ultrarelativistic heavy ions collisions, i.e. in terms the viscosity-to-entropy ratio.
On behalf of collaboration: None

Primary author

Prof. Vladimir Filinov (Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia)

Co-authors

Prof. Michael Bonitz (Christian Albrechts University, Kiel) Dr Pavel Levashov (Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia) Prof. Vladimir Fortov (Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia) Prof. Yurii Ivanov (Kurchatov Institute, Moscow, Russia)

Presentation Materials