Fig. 1: Principles of the closed- and open-loop MFB-CIMs' operation.
From: A benchmarking study of quantum algorithms for combinatorial optimization
a Schematic diagram of the measurement-feedback coupling CIMs with and without the self-diagnosis and dynamic feedback control (closed-loop and open-loop CIMs) indicated using dashed blue and orange lines, respectively. b, c Dynamical behavior of the closed-loop and open-loop CIMs, respectively. (b1) and (c1) Inferred Ising energy (the dashed horizontal lines are the lowest three Ising eigenenergies). (b2) and (c2) Mean-field amplitude μi(t). (b3) and (c3) Feedback-field amplitude ei(t). (b4) Target squared amplitude a(t). (c4) Pump rate p(t).
