Electric Conductivity of the QGP

Hot Quarks 2014: Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions

Puglisi, Armando^1,2 ; Plumari, Salvatore^1,2 ; Greco, Vincenzo^1,2

Department of Physics and Astronomy, University of Catania, Via Santa Sofia 64, Catania

I-95125, Italy^1

Laboratorio Nazionale Del Sud, INFN-LNS, Via Santa Sofia 63, Catania

I-95125, Italy^2

关键词: Analytic formula;    Boltzmann transport;    Coupling constants;    Numerical results;    Periodic boundary conditions;    Quark-gluon plasma;    Relaxation time approximation;    Transport coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/612/1/012057/pdf
DOI  :  10.1088/1742-6596/612/1/012057

来源: IOP

【 摘 要 】

The transport coefficients of strongly interacting matter have attracted a great interest in the field of Quark-Gluon Plasma (QGP). In this work we compute electric conductivity σelsolving numerically the Relativistic Boltzmann Transport (RBT) equation in a uniform box with periodic boundary conditions considering 2 - body scatterings. We compare numerical results obtained using two methods, Green-Kubo correlator and E-field method, with analytic formulas in Relaxation Time Approximation (RTA). We present results for the realistic case of the QGP system considering both a quasi-particle model tuned to lattice QCD thermodynamics as well as the case of a pQCD gas with a running coupling constant. Calculations based on RTA underestimate σelof about 60%.