磁気スキルミオンを用いた物理リザバー計算.

Magnetic skyrmions are topological spin textures, with great potential for energy-saving next generation devices such as non-volatile memory devices. Recently, the application of skyrmions to neuromorphic devices, including physical reservoir computing devices, has attracted much attention. In this article, we introduce the recent progress in research on skyrmion-based physical reservoir computing, mainly focusing on our results. We recently demonstrated physical reservoir computing using the nonlinear response originating from the magnetic-field induced dynamics of skyrmions formed in ultrathin multilayer films. We succeeded in waveform recognition and handwritten digit recognition. Notably, there is a positive correlation between the recognition accuracy and the number of skyrmions in the devices. In addition to our results, skyrmion-based reservoir computing devices have also been reported by other groups, highlighting the high potential of magnetic skyrmions for physical reservoir computing. [ABSTRACT FROM AUTHOR]