20 February 2017 Large-scale artificial spin network based on time-multiplexed degenerate optical parametric oscillators for coherent Ising machine
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Abstract
We describe a large-scale degenerate optical parametric oscillator (DOPO) network for a coherent Ising machine that solves combinatorial optimization problems. By pumping a fiber-based phase-sensitive amplifier placed in a 1-km fiber cavity at a 2-GHz repetition frequency, we generated more than 10,000 DOPOs multiplexed in the time domain. We confirmed that the DOPO phases were discretized to {0, π} indicating that they could be used as stable artificial spins. We also implemented a one-dimensional Ising model by optically coupling adjacent DOPOs, and confirmed that the DOPOs well simulated the behavior of low-temperature spins.
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Hiroki Takesue, Takahiro Inagaki, Kensuke Inaba, Ryan Hamerly, Kyo Inoue, Yoshihisa Yamamoto, "Large-scale artificial spin network based on time-multiplexed degenerate optical parametric oscillators for coherent Ising machine", Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008812 (20 February 2017); doi: 10.1117/12.2255796; https://doi.org/10.1117/12.2255796
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