Stochasticity of the magnon parametron

マグノンパラメトロンの確率性

Elyasi, M.*; 齊藤 英治; Bauer, G. E. W.*

Elyasi, M.*; Saito, Eiji; Bauer, G. E. W.*

Unconventional computing schemes based on bistable systems ("Ising spins") may supersede conventional computing paradigms. The "magnon parametron" is an Ising spin that forms as a result of parametric excitation of a ferromagnetic particle by microwaves beyond a certain threshold. This Ising spin becomes unstable at a second threshold power at which a high-frequency telegraph noise emerges. We explain the experimentally observed stochastic switching ("p-bit" characteristics) at room temperature by the Suhl instability of the uniform magnetization precession.