QCD thermodynamics from lattice calculations with non-equilibrium methods: The SU(3) equation of state

TL;DR

This paper introduces a non-equilibrium lattice simulation method based on Jarzynski's theorem to accurately determine the SU(3) Yang-Mills equation of state, offering a new approach to QCD thermodynamics.

Contribution

It presents a novel simulation algorithm that computes thermodynamic quantities in equilibrium by driving lattice configurations out of equilibrium, improving efficiency and accuracy.

Findings

Successful lattice determination of SU(3) equation of state

Comparison shows competitive accuracy with existing methods

Discussion on extending to full QCD and other observables

Abstract

A precise lattice determination of the equation of state in SU(3) Yang-Mills theory is carried out by means of a simulation algorithm, based on Jarzynski's theorem, that allows one to compute physical quantities in thermodynamic equilibrium, by driving the field configurations of the system out of equilibrium. The physical results and the computational efficiency of the algorithm are compared with other state-of-the-art lattice calculations, and the extension to full QCD with dynamical fermions and to other observables is discussed.