Quark-Gluon Plasma/Black Hole duality from Gauge/Gravity Correspondence

TL;DR

This paper explores the duality between quark-gluon plasma and black holes using Gauge/Gravity correspondence, providing insights into strongly coupled QCD matter's hydrodynamics and thermalization.

Contribution

It demonstrates how gravitational duals, such as black hole geometries, can model the hydrodynamic properties of strongly coupled quark-gluon plasma.

Findings

Black hole geometries correspond to nearly perfect fluid behavior.

Gauge/Gravity duality offers a framework to study QGP viscosity and thermalization.

Insights from dual models may inform heavy ion collision experiments.

Abstract

The Quark-Gluon Plasma (QGP) is the QCD phase of matter expected to be formed at small proper-times in the collision of heavy-ions at high energy. Experimental observations seem to favor a strongly coupled QCD plasma with the hydrodynamic properties of a quasi-perfect fluid, i.e. rapid thermalization (or isotropization) and small viscosity. The theoretical investigation of such properties is not obvious, due to the the strong coupling. The Gauge/Gravity correspondence provides a stimulating framework to explore the strong coupling regime of gauge theories using the dual string description. After a brief introduction to Gauge/Gravity duality, and among various existing studies, we focus on challenging problems of QGP hydrodynamics, such as viscosity and thermalization, in terms of gravitational duals of both the static and relativistically evolving plasma. We show how a Black Hole geometry arises naturally from the dual properties of a nearly perfect fluid and explore the lessons and prospects one may draw for actual heavy ion collisions from the Gauge/Gravity duality approach.