Regensburg 2025 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 32: Nonlinear Stochastic Systems
DY 32.2: Talk
Thursday, March 20, 2025, 10:00–10:15, H43
Oscillations and self-generated noise in a nonreciprocal single-species XY-model — •Thomas Suchanek1 and Sarah Loos2 — 1Institut für Theoretische Physik, Universität Leipzig, Leipzig, Germany — 2DAMTP, University of Cambridge, Cambridge, United Kingdom
We study the low temperature dynamics of an XY-model with random nonreciprocal couplings. Upon increasing average nonreciprocity, we observe a transition from a state of coherent oscillations to a chaotic stationary state. For a randomly selected degree of freedom, we derive an effective description of the dynamics in terms of a stochastic differential equation. This allows us to analyze the properties of the stochastic motion as well as the response of the system to perturbations.
Keywords: Nonlinear Dynamics; Disordered Systems; Nonreciprocity