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arXiv:1407.2871 · Nature Photonics

Network of time-multiplexed optical parametric oscillators as a coherent Ising machine

Alireza Marandi, Zhe Wang, Kenta Takata, Robert L. Byer, Y. Yamamoto

Published Oct 24, 2014• 543 citations
arXivHTMLPDF
DOI
10.1038/nphoton.2014.249

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We report a coherent Ising machine (CIM), which is a network of degenerate optical parametric oscillators for simulating the Ising model. Using a long-distance fiber cavity that includes a telecom-band phase sensitive amplifier, we generated large number of degenerate optical parametric oscillator (DOPO) pulses multiplexed in time domain, which represent the Ising spins. By using a measurement and feedback scheme, we could implement all-to-all coupling among 2048 DOPOs. We experimentally confirmed that the CIM could find solutions to maximum cut problems for graphs with as many as 2000 nodes.