190 citations · 759 across the 42 of their papers we have counts for
42 papers
Black-box optimization for integer-variable problems using Ising machines and factorization machines
Yuya Seki, Ryo Tamura, Shu Tanaka
Black-box optimization has potential in numerous applications such as hyperparameter optimization in machine learning and optimization in design of experiments. Ising machines are…
Continuous black-box optimization with quantum annealing and random subspace coding
Syun Izawa, Koki Kitai, Shu Tanaka +2
A black-box optimization algorithm such as Bayesian optimization finds extremum of an unknown function by alternating inference of the underlying function and optimization of an ac…
Data-driven determination of the spin Hamiltonian parameters and their uncertainties: The case of the zigzag-chain compound KCuPO
Ryo Tamura, Koji Hukushima, Akira Matsuo +2
We propose a data-driven technique to estimate the spin Hamiltonian, including uncertainty, from multiple physical quantities. Using our technique, an effective model of KCuP$_…
Phenomenology of the chiral -wave state in the hexagonal pnictide superconductor SrPtAs
Hikaru Ueki, Shoma Inagaki, Ryota Tamura +5
The pairing symmetry of the hexagonal pnictide superconductor SrPtAs is discussed with taking into account its multiband structure. The topological chiral -wave state with time-…
Valley current filtering and reversal by parallel side contacted armchair nanotubes
Ryo Tamura
The intertube conductance of the parallel side contacted armchair nanotubes is calculated by Landauer's formula as a function of the Fermi level . When the intertube differe…
Expanding the horizon of automated metamaterials discovery via quantum annealing
Koki Kitai, Jiang Guo, Shenghong Ju +4
Complexity of materials designed by machine learning is currently limited by the inefficiency of classical computers. We show how quantum annealing can be incorporated into automat…