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DY: Fachverband Dynamik und Statistische Physik

DY 44: Poster: Statistical Physics

DY 44.12: Poster

Thursday, March 30, 2023, 13:00–16:00, P1

Exploiting Skyrmion motion for computing — •Alessandro Pignedoli, Björn Dörschel, and Karin Everschor-Sitte — University of Duisburg-Essen, Duisburg, Germany

Brownian motion is a natural phenomenon that can be exploited for energy efficient computing. Here, an assemblage of simple parts evolves in an energetic labyrinth to a low energy state which is isomorphic to the desired solution of a computation [1]. Magnetic Skyrmions [2] are topologically stable magnetic whirls that have been shown to behave like interacting Brownian particles [3,4]. We use a Langevin model to describe and investigate the motion of Skyrmions by means of correlations and statistical observables to carry out Brownian computation. We show that besides the Brownian motion of individual Skyrmions, their interactions and external driving forces break ergodicity. This allows for a rapid convergence to the low-energy state of the system and thus solves the calculation faster.

[1] C. H. Bennett, Int. J. Theor. Phys. 21, 905 (1982) [2] K. Everschor-Sitte, J. Masell, R. M. Reeve and M. Kläui, J. Appl. Phys.124, 240901 (2018) [3]J. Zázvorka, et al. Nat. Nanotechnol. 14, 658 (2019) [4] T.Nozaki, et al Appl. Phys. Lett. 114, 012402 (2019)