Dynamical fluctuations in critical regime and across the 1st order phase transition

2017/04/16 by Lijia Jiang, Shanjin Wu, Huichao Song · 18 citations
Chemistry · Physics and Astronomy · #Chemistry #Condensed matter physics #Critical phenomena #Economics #High-Energy Particle Collisions Research #Order (exchange) #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum critical point #Quantum phase transition #Statistical physics #Theoretical and Computational Physics #Transition (genetics) #nucl-th

paper · pdf · open access · doi:10.1016/j.nuclphysa.2017.06.047

published in Nuclear Physics A 967, 441-444 (Elsevier BV) · 4 pages, 2 figures, proceedings for Quark Matter 2017

arxiv created 2017/04/16 · openalex publication_date 2017/09/25 · arxiv updated 2018/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

In this proceeding, we study the dynamical evolution of the sigma field within the framework of Langevin dynamics. We find that, as the system evolves in the critical regime, the magnitudes and signs of the cumulants of sigma field, C3 and C4, can be dramatically different from the equilibrated ones due to the memory effects near Tc. For the dynamical evolution across the 1st order phase transition boundary, the supercooling effect leads the sigma field to be widely distributed in the thermodynamical potential, which largely enhances the cumulants C3, C4, correspondingly.

Citations

• Real-time evolution of non-Gaussian cumulants in the QCD critical regime
• Dynamic universality class of the QCD critical point
• Nonequilibrium chiral fluid dynamics including dissipation and noise
• Non-Gaussian Fluctuations near the QCD Critical Point
• Theory of dynamic critical phenomena
• Effective action for the chiral quark-meson model

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• Critical point of nuclear matter and beam-energy dependence of net-proton number fluctuations