Quantum model for coherent Ising machines: Discrete-time measurement feedback formulation
Atsushi Yamamura, Kazuyuki Aihara, Y. Yamamoto · Physical Review A · 2017
Recently, the coherent Ising machine (CIM) as a degenerate optical parametric oscillator (DOPO) network has been researched to solve Ising combinatorial optimization problems. We formulate a theoretical model for the CIM with discrete-time measurement feedback processes, and perform numerical simulations for the simplest network, composed of two degenerate optical parametric oscillator pulses with the antiferromagnetic mutual coupling. We evaluate the extent to which quantum coherence exists during the optimization process.