Magnons are elementary excitations in magnetic materials and undergo nonlinear multimode scattering processes at large input powers. In experiments and simulations, we show that the interaction between magnon modes of a confined magnetic vortex can be harnessed for pattern recognition. We study the magnetic response to signals comprising sine wave pulses with frequencies corresponding to radial mode excitations. Three-magnon scattering results in the excitation of different azimuthal modes, whose amplitudes depend strongly on the input sequences. We show that recognition rates above 95\% can be attained for four-symbol sequences using the scattered modes, with strong performance maintained with the presence of amplitude noise in the inputs.
@article{arxiv.2211.02328,
title = {Pattern recognition with a magnon-scattering reservoir},
author = {Lukas Körber and Christopher Heins and Tobias Hula and Joo-Von Kim and Helmut Schultheiss and Jürgen Fassbender and Katrin Schultheiss},
journal= {arXiv preprint arXiv:2211.02328},
year = {2023}
}