Fig. 7: Reports of reservoir computing using multiple nodes are plotted as a function of the length between nodes (l) and characteristic wave speed (v) times delay time (τ₀) for photonics systems (open symbols) and spintronics systems (solid symbols).

The size of symbols corresponds to MC, which is taken from literature^{12,23,34,41,42,43,45} and this work. The color scale represents MC evaluated by using the response function method. Inset figures show comparison between micromagnetic simulation and response function simulation using Gaussian model Eq. (19). Solid and open star symbols in the insets are vτ₀ evaluated by considering dipole interaction only (v = 200 m/s) and with modification of exchange interaction (v = 1000 m/s).