[7p-A410-1~9] 4.9 Quantum Optics

▲ [7p-A410-3] [JSAP-OSA Joint Symposia 2017 Invited Talk] Solving intractable problems with coherent Ising machine

〇Hiroki Takesue¹, Takahiro Inagaki¹, Kensuke Inaba¹, Toshimori Honjo¹, Takuya Ikuta¹, Hiroyuki Uchiyama^1,2, Koji Enbutsu³, Takeshi Umeki³, Ryoichi Kasahara³ (1.NTT BRL, 2.NTT SIC, 3.NTT DTL)

Keywords:optical parametric oscillator, combinatorial optimization problem, phase sensitive amplification

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. We then present our experiments where we found solutions to complex combinatorial optimization problems using a CIM with measurement-feedback scheme. Finally, a future perspective of the CIM project will briefly described.