activity
20242026
collaborators

6 papers

quant-ph2026

Slack-Free Deep-Unfolded Combinatorial Optimization Solver for Inequality Constraints

Ryo Hagiwara, Shunta Arai, Satoshi Takabe

Quantum annealing (QA) is used to solve combinatorial optimization problems (COPs). When COPs are implemented on quantum annealers, they are typically encoded as quadratic unconstr…

eess.SP2026

Physics-Aware Linearized ADMM and Its Unrolling

Satoshi Takabe, Shunta Arai, Tadashi Wadayama

Recently, partial differential equations (PDEs) have been used to directly model the measurement process in signal processing, although their evaluation is costly. In this paper, w…

physics.comp-ph2026

Refined Gradient-Based Temperature Optimization for the Replica-Exchange Monte-Carlo Method

Tatsuya Miyata, Shunta Arai, Satoshi Takabe

The replica-exchange Monte-Carlo (RXMC) method is a powerful Markov-chain Monte-Carlo algorithm for sampling from multi-modal distributions, which are challenging for conventional…

quant-ph2025

Quantum Annealing Enhanced Markov-Chain Monte Carlo

Shunta Arai, Tadashi Kadowaki

In this study, we propose quantum annealing-enhanced Markov Chain Monte Carlo (QAEMCMC), where QA is integrated into the MCMC subroutine. QA efficiently explores low-energy configu…

quant-ph2025

Transfer Learning for Deep-Unfolded Combinatorial Optimization Solver with Quantum Annealer

Ryo Hagiwara, Shunta Arai, Satoshi Takabe

Quantum annealing (QA) has attracted research interest as a sampler and combinatorial optimization problem (COP) solver. A recently proposed sampling-based solver for QA significan…

quant-ph2024

Deep Unfolded Local Quantum Annealing

Shunta Arai, Satoshi Takabe

Local quantum annealing (LQA), an iterative algorithm, is designed to solve combinatorial optimization problems. It draws inspiration from QA, which utilizes adiabatic time evoluti…