Spin-wave-based physical reservoir computing (RC) is a promising candidate for energy-efficient physical implementations of artificial intelligence because of its potential for nanoscale integration with low power consumption. Most of the previous studies on spin-wave RC have utilized spin waves excited in a single-layer ferromagnet. In this study, we focused on spin waves in a synthetic antiferromagnet (SAF), consisting of two ferromagnetic layers coupled antiferromagnetically, and investigated additional memory properties of spin-wave RC. We theoretically and numerically demonstrate the emergence of two distinct memory properties in the SAF device due to the distinct spin-wave characteristics of the acoustic and optical modes inherent in SAFs.
@article{arxiv.2603.22696,
title = {Distinct memory properties in spin-wave reservoir computing based on synthetic antiferromagnet},
author = {Takumu Shinkai and Satoshi Iihama and Kensuke Hayashi and Takahiro Moriyama and Shigemi Mizukami and Natsuhiko Yoshinaga},
journal= {arXiv preprint arXiv:2603.22696},
year = {2026}
}