323 citations · 1.3k across the 40 of their papers we have counts for
40 papers
Penalty-Free Two-Step Optimization of Higher-Order Ising Problems for Two-Dimensional Line-Controlled RIS
Tasuku Okamoto, Naoki Ishikawa, Daisuke Kitayama +5
Reconfigurable intelligent surfaces (RISs) are often assumed to allow continuous phase control over all elements, leading to hardware cost that scales with the number of elements.…
Scalable and Near-Optimal Discrete Phase Shift Optimization for Reconfigurable Intelligent Surfaces with Over 20,000 Elements
Yuto Hama, Daisuke Kitayama, Kensuke Inaba +4
This paper proposes a novel optimization framework for discrete phase shifts of a reconfigurable intelligent surface (RIS) using a coherent Ising machine (CIM). Unlike conventional…
10-GHz-clock time-multiplexed non-degenerate optical parametric oscillator network with a variable planar lightwave circuit interferometer
Yuya Yonezu, Kensuke Inaba, Yasuhiro Yamada +4
A coherent XY machine (CXYM) is a physical spin simulator that can simulate the XY model by mapping XY spins onto the continuous phases of non-degenerate optical parametric oscilla…
Observing a Phase Transition in a Coherent Ising Machine
Hiroki Takesue, Yasuhiro Yamada, Kensuke Inaba +8
A coherent Ising machine (CIM) is known to deliver the low-energy states of the Ising model. Here, we investigate how well the CIM simulates the thermodynamic properties of a two-d…
Detecting partial synchrony in a complex oscillatory network using pseudo-vortices
Yasuhiro Yamada, Kensuke Inaba
Partial synchronization is characteristic phase dynamics of coupled oscillators on various natural and artificial networks, which can remain undetected due to the complexity of the…
Thermodynamic quantities of two-dimensional Ising models obtained by noisy mean field annealing and coherent Ising machine
Kensuke Inaba, Yasuhiro Yamada, Hiroki Takesue
Noisy mean field annealing (NMFA) is an algorithm that mimics a coherent Ising machine (CIM), which is an optical system for solving Ising problems. The NMFA has reproduced the sol…