Electrical conductivity of the quark-gluon plasma across the deconfinement transition

TL;DR

This study calculates the electrical conductivity of the quark-gluon plasma across the deconfinement transition using lattice QCD simulations, providing insights into its behavior at different temperatures.

Contribution

First lattice QCD calculation of the electrical conductivity of the quark-gluon plasma across the deconfinement transition with detailed spectral analysis.

Findings

Conductivity varies smoothly across the transition

Spectral functions obtained via Maximal Entropy Method show consistent results

Systematic uncertainties discussed in the analysis

Abstract

A lattice calculation is presented for the electrical conductivity of the QCD plasma with 2+1 dynamical flavours at nonzero temperature. We employ the conserved lattice current on anisotropic lattices using a tadpole-improved clover action and study the behaviour of the conductivity over a wide range of temperatures, both below and above the deconfining transition. The conductivity is extracted from a spectral-function analysis using the Maximal Entropy Method and a discussion of its systematics is provided.