Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.39: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Atomistic spin dynamics with quantum coloured noise — •Fried-Conrad Weber1,2, Felix Hartman2, Matias Bargheer1,2, Janet Anders2,3, and Richard Evans4 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH — 2University of Potsdam, Institute of Physics and Astronomy — 3Department of Physics and Astronomy, University of Exeter — 4School of Physics, Engineering and Technology, University of York
Predicting temperature-dependent magnetisation is a challenge to classical atomistic spin dynamics (ASD) due to the absence of quantum statistics. Here, we present a novel implementation of an open-system Landau-Lifshitz-Gilbert equation within the VAMPIRE package that incorporates quantum coloured noise and non-Markovian memory effects. This approach models the quantum nature of the thermal bath and its self-consistent interaction with magnetic moments. Our results show excellent quantitative agreement with experimental magnetisation curves for nickel and gadolinium across the full temperature range, significantly enhancing the predictive capabilities of ASD beyond standard classical methods.
Keywords: Atomistic Spin Dynamics; Equilibrium magnetization