[19p-Z34-1~17] FS.1 Focused Session "AI Electronics"

△ [19p-Z34-6] Bifurcations and information processing capacity in coupled spintronics reservoirs

〇(D)Nozomi Akashi¹, Sumito Tsunegi², Tomohiro Taniguchi², Mitsuhiro Nishida³, Ryo Sakurai³, Yasumichi Wakao³, Kohei Nakajima¹ (1.Univ. Tokyo, 2.AIST, 3.Bridgestone)

Keywords:physical reservoir computing, spintronics, chaos

Spin-torque oscillators (STOs) show nonlinear magnetization dynamics and have been studied as promising candidates for physical reservoir computing due to their minute size, high-speed time scale, and high level of energy efficiency. In this study, we propose coupled spintronics reservoirs (CSRs), which couple multiple STOs through magnetic fields. We reveal diverse bifurcations of CSRs and that the information processing capacity of CSRs drastically changes according to these bifurcations. As a result, it is demonstrated that CSRs solve virtual and real-world benchmark tasks with high accuracy.