Koji Enbutsu

TL;DR: It is shown that an optical processing approach based on a network of coupled optical pulses in a ring fiber can be used to model and optimize large-scale Ising systems, and a coherent Ising machine outperformed simulated annealing in terms of accuracy and computation time for a 2000-node complete graph.

TL;DR: In this paper, the D-Wave quantum annealer outperforms the CIMs on MAX-CUT on cubic graphs, however, they observe an exponential penalty on denser problems, leading to a several orders of magnitude time-to-solution difference for instances with over 50 vertices.

TL;DR: In this paper, the performance of two types of annealing machines, a commercially available quantum annealer built by D-Wave Systems, and measurement-feedback coherent Ising machines (CIMs) based on optical parametric oscillator networks, were compared on two classes of problems, the Sherrington-Kirkpatrick (SK) model and MAX-CUT.

TL;DR: In this paper, a single-pass optical parametric amplifier (OPA) based on a single spatial-mode periodically poled ZnO:LiNbO3 waveguide was used for continuous-wave (CW) squeezed light.

TL;DR: In this article, the authors analyzed the dynamics during the ground state search of 2D Ising models with up to 1936 mutually coupled DOPOs and determined that calculation performance is limited by freeze-out effects and can be improved by controlling the DOPO dynamics, which allows to optimize performance of coherent Ising machines in various tasks.