45 citations · 141 across the 12 of their papers we have counts for
12 papers
Magnetization process of the S=1/2 Heisenberg antiferromagnet on the floret pentagonal lattice
Rito Furuchi, Hiroki Nakano, Norikazu Todoroki +1
We study the S=1/2 Heisenberg antiferromagnet on the floret pentagonal lattice by numerical diagonalization method. This system shows various behaviours that are different from tha…
Stationarity analysis of the stock market data and its application to mechanical trading
Kazuki Kanehira, Norikazu Todoroki
This study proposes a scheme for stationarity analysis of stock price fluctuations based on KMO-Langevin theory. Using this scheme, we classify the time-series data of stock pr…
Shape-constrained reconstruction in diffuse optical tomography by simulated annealing
Tetsuya Mimura, Yu Jiang, Norikazu Todoroki +1
When the inverse problem of diffuse optical tomography (DOT) is solved with the Born or Rytov approximation, the size of the matrix of the linear inverse problem becomes large if t…
Diffuse optical tomography by simulated annealing via a spin Hamiltonian
Yu Jiang, Manabu Machida, Norikazu Todoroki
Diffuse optical tomography (DOT) is an imaging modality which uses near-infrared light. Although iterative numerical schemes are commonly used for its inverse problem, correct solu…
Haldane Gaps of Large-S Heisenberg Antiferromagnetic Chains and Asymptotic Behavior
Hiroki Nakano, Norikazu Todoroki, Toru Sakai
The one-dimensional Heisenberg antiferromagnets of large-integer- spins are studied; their Haldane gaps are estimated by the numerical diagonalization method for and .…
Generalized Cubic Model for BaTiO-like Ferroelectric Substance
Norikazu Todoroki
We propose an order-disorder type microscopic model for BaTiO-like Ferroelectric Substance. Our model has three phase transitions and four phases. The symmetry and directions o…