DPG Phi
Verhandlungen
Verhandlungen
DPG

Gießen 2024 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 48: Heavy-Ion Collisions and QCD Phases XII

HK 48.4: Vortrag

Mittwoch, 13. März 2024, 18:15–18:30, HBR 14: HS 1

Critical dynamics of non-equilibrium phase transitions — •Leon Sieke1, Mattis Harhoff3, Sören Schlichting3, and Lorenz von Smekal1,21Institut für Theoretische Physik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — 2Helmholtz Research Academy for FAIR (HFHF), Campus Gießen, 35392 Gießen, Germany — 3Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany

In context of the search for the QCD critical endpoint in heavy-ion collisions, a deep understanding of the out-of-equilibrium dynamics of the system is necessary to make well-grounded predictions for signatures in final states. To this end, we investigate the dynamic critical behavior of a classical scalar field theory with Z2 symmetry in the dynamic universality class of Model A in two and three spatial dimensions. The critical dynamics of the system is studied under a linear quench protocol, where the external symmetry breaking field is changed at a constant rate through the critical point. We discuss the connection to the Kibble-Zurek mechanism and determine the dynamic critical exponent z as well as universal scaling functions. These fully describe the non-equilibrium evolution of the system near the critical point for all quench rates under consideration. We find that while the scaling functions are non-trivial, the corresponding scaling exponents are fully determined by the static critical exponents and the dynamic critical exponent. Finally, we perform a finite-size scaling analysis and observe good collapse of the data onto universal finite-size scaling functions.

Keywords: dynamic critical phenomena; scalar field theory; classical-statistical simulations

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Gießen