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DY: Fachverband Dynamik und Statistische Physik
DY 48: Statistical Physics far from Thermal Equilibrium
DY 48.2: Vortrag
Donnerstag, 19. März 2020, 09:45–10:00, ZEU 147
Tuning Interaction in Long-Range Models Changes Dynamical Scaling During Aging — •Henrik Christiansen1, Suman Majumder1, Malte Henkel2,3, and Wolfhard Janke1 — 1Institut für Theoretische Physik, Universität Leipzig, IPF 231101, 04081 Leipzig, Germany — 2Laboratoire de Physique et Chimie Théoriques (CNRS UMR 7019),Université de Lorraine Nancy, 54506 Vandaeuvre-lès-Nancy Cedex, France — 3Centro de Física Teórica e Computacional, Universidade de Lisboa, 1749-016 Lisboa, Portugal
Aging in phase-ordering kinetics of the long-ranged d=2 Ising model is studied via Monte Carlo simulations. The dynamical scaling and aging behavior is analyzed. The dynamical scaling of the spin-spin two-time autocorrelation function is best described by sub-aging in the regime of long-range interactions and by simple aging for effective short-range interactions. The sub-aging exponent µ and the nonequilibrium autocorrelation exponent λ depend explicitly on the range parameter σ. Our data support the relation λ=σ for σ ≤ 1 and λ=1.25 for σ > 1.