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Conference on Lasers and Electro-Optics

Long-Term Stable Operation of Coherent Ising Machine for Cloud Service

Toshimori Honjo, Takahiro Inagaki, Kensuke Inaba, Takuya Ikuta, Hiroki Takesue

Published Jan 1, 2018• 2 citations
Publisher

Abstract

A 24-hour stable operation of a coherent Ising machine, an Ising model solver based on a network of degenerate optical parametric oscillators, was successfully demonstrated. The average success probability of computation exceeds 94%.
DOI
10.1364/cleo_at.2018.jtu2a.87

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A degenerate optical parametric oscillator network is proposed to solve the NP-hard problem of finding a ground state of the Ising model. The underlying operating mechanism originates from the bistable output phase of each oscillator and the inherent preference of the network in selecting oscillation modes with the minimum photon decay rate. Computational experiments are performed on all instances reducible to the NP-hard MAX-CUT problems on cubic graphs of order up to 20. The numerical results reasonably suggest the effectiveness of the proposed network.
We introduce the recent progress of coherent Ising machine (CIM), which finds solutions to complex combinatorial optimization problems using a network of degenerate optical parametric oscillators (DOPO). We describe our effort to generate time-multiplexed DOPOs using long-distance fiber cavities including telecom-band phase sensitive amplifiers [1-4]. We then present our experiments where we found solutions to complex combinatorial optimization problems using a CIM with measurement-feedback scheme [5]. Finally, a future perspective of the CIM project will briefly described.