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DY: Fachverband Dynamik und Statistische Physik

DY 42: Focus Session: Computing with Dynamical Systems: New Perspectives on Reservoirs and Applications I – Fundamentals

DY 42.7: Talk

Thursday, March 21, 2024, 11:30–11:45, BH-N 243

Exploiting the Brownian motion of quasi-particles for unconventional computing — •Alessandro Pignedoli, Björn Dörschel, and Karin Everschor-Sitte — Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen

The Brownian motion of quasi-particles offer a natural way of exploring the configuration space of a system. By mapping computational problems into this phenomenon, an ensemble of these particles can effectively solve them in an energy-efficient manner [1]. In this regard, magnetic skyrmions, which are topologically stable magnetic whirls that have been shown to behave like interacting Brownian particles, are promising candidates [2]. In this work, we show that the natural stochastic movement of such quasi-particles, in a given environment, provides a tool to solve different optimisation problems [3,4]. This type of computation could open up a new paradigm of low-power, in-materio implementation of swarm intelligence algorithms.

[1] C. H. Bennett, Int. J. Theor. Phys. 21, 905 (1982); [2] J. Zázvorka, et al. Nat. Nanotechnol. 14, 658 (2019); [3] German Patent Application DE 10 2023 131 171, K. Everschor-Sitte, A. Pignedoli, B. Dörschel (2023); [4] German Patent Application DE 10 2023 131 706, K. Everschor-Sitte, A. Pignedoli, B. Dörschel (2023).

Keywords: Unconventional computing; Skyrmions; Swarm intelligence; Brownian motion; Optimisation problem