Thermalization and dynamical spectral properties in the quark-meson model

Abstract

We investigate the nonequilibrium evolution of the quark-meson model using two-particle irreducible effective action techniques. Our numerical simulations, which include the full dynamics of the order parameter of chiral symmetry, show how the model thermalizes into different regions of its phase diagram. In particular, by studying quark and meson spectral functions, we shed light on the real-time dynamics approaching the crossover transition, revealing e.g. the emergence of light effective fermionic degrees of freedom in the infrared. At late times in the evolution, the fluctuation-dissipation relation emerges naturally among both meson and quark degrees of freedom, confirming that the simulation successfully reaches thermal equilibrium.

References in corpus (46)

• Prethermalization
• Introduction to Nonequilibrium Quantum Field Theory
• The QCD phase structure at finite temperature and density
• The phase structure of the Polyakov--quark-meson model beyond mean field
• Non-perturbative quark, gluon and meson correlators of unquenched QCD
• The Phase Diagram of the Quark-Meson Model
• Chiral phase transition temperature in (2+1)-Flavor QCD
• Controlled nonperturbative dynamics of quantum fields out of equilibrium
• Far-from-equilibrium dynamics with broken symmetries from the 2PI-1/N expansion
• Higher order fluctuations and correlations of conserved charges from lattice QCD
• Meson fluctuations and thermodynamics of the Polyakov loop extended quark-meson model
• Thermalization of fermionic quantum fields
• Nonequilibrium time evolution of the spectral function in quantum field theory
• Universal self-similar dynamics of relativistic and nonrelativistic field theories near nonthermal fixed points
• Curvature of the pseudocritical line in QCD: Taylor expansion matches analytic continuation
• Spectral Functions for the Quark-Meson Model Phase Diagram from the Functional Renormalization Group
• Real time correlation functions and the functional renormalisation group
• Baryon number fluctuations at finite temperature and density
• In-Medium Spectral Functions of Vector- and Axial-Vector Mesons from the Functional Renormalization Group
• Quantum theory of fermion production after inflation
• Analytic continuation of functional renormalization group equations
• Quark Spectral Function and Deconfinement at Nonzero Temperature
• Spectral function for overoccupied gluodynamics from real-time lattice simulations
• Finite temperature spectral functions in the O(N)-model
• Quark spectral density and a strongly-coupled QGP
• Instability-induced fermion production in quantum field theory
• Quark propagator at finite temperature and finite momentum in quenched lattice QCD
• Quark spectral properties above Tc from Dyson-Schwinger equations
• Quark Spectrum above but near Critical Temperature of Chiral Transition
• Functional renormalization group analysis of the soft mode at the QCD critical point
• Bayesian analysis of quark spectral properties from the Dyson-Schwinger equation
• Bound state properties from the Functional Renormalisation Group
• Spectral functions and critical dynamics of the $O(4)$ model from classical-statistical lattice simulations
• The Chiral Phase Transition at High Baryon Density from Nonperturbative Flow Equations
• Novel Collective Excitations and the Quasi-Particle Picture of Quarks Coupled with a Massive Boson at Finite Temperature
• Spectral properties of massless and massive quarks coupled with massive boson at finite temperature
• Breaking the Fluctuation-Dissipation Relation by Universal Transport Processes
• Meson Spectral Functions at Finite Temperature and Isospin Density with Functional Renormalization Group
• Fermionic spectral functions with the Functional Renormalization Group
• Tachyonic instability of the scalar mode prior to QCD critical point based on Functional renormalization-group method
• Unraveling the nature of universal dynamics in $O(N)$ theories
• Amplified Fermion Production from Overpopulated Bose Fields
• Fluctuating vector mesons in analytically continued FRG flow equations
• Functional Renormalization Group Study of Phonon Mode Effects on Chiral Critical Point
• Spectral, statistical and vertex functions in scalar quantum field theory far from equilibrium
• Fermion spectral function in hot strongly interacting matter from the functional renormalization group

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• Self-consistent $O(4)$ model spectral functions from analytically continued FRG flows
• Kinetics of the chiral phase transition in a quark-meson $\sigma$-model