Low Power Ising System

An Ising system comprising:

• a plurality of parametric frequency dividers (PFDs), each including:
• a resonant input mesh driven by a pump signal;
• a resonant output mesh coupled to the input mesh through a nonlinear component, and
• the nonlinear component configured to passively activate, responsive to the pump signal exceeding a threshold power (Pth), a parametric oscillation between the input and output meshes having an oscillation frequency equal to half an angular input frequency of the pump signal,
• a plurality of dissipative couplings, each connecting two or more of the output meshes of the plurality of PFDs;
• wherein an output signal of each of the PFDs is switchable between an in-phase state and an out-of-phase state;
• and
• wherein the pump signal exceeding the threshold power drives an oscillating spin coupling between at least one pair of PFDs connected by one of the dissipative couplings.