Shoko Utsunomiya

Truncated Wigner theory of coherent Ising machines based on degenerate optical parametric oscillator network

2016 · Physica Scripta

We present the quantum theory of coherent Ising machines based on networks of degenerate optical parametric oscillators (DOPOs). In a simple model consisting of two coupled DOPOs, both positive- P representation and truncated Wigner representation …

Potts model solver based on hybrid physical and digital architecture

2022 · Communications Physics

Abstract The Potts model describes Ising-model-like interacting spin systems with multivalued spin components, and ground-state search problems of the Potts model can be efficiently mapped onto various integer optimization problems thanks to the rich expression …