152 citations · 769 across the 17 of their papers we have counts for
17 papers
Universal relation between the dispersion curve and the ground-state correlation length in 1D antiferromagnetic quantum spin systems
K. Okunishi, Y. Akutsu, N. Akutsu +1
We discuss an universal relation with in 1D quantum spin systems with an excitation gap, where is the dispersion curve of the low-energy excitatio…
Vicinal Surface with Langmuir Adsorption: A Decorated Restricted Solid-on-solid Model
Noriko Akutsu, Yasuhiro Akutsu, Takao Yamamoto
We study the vicinal surface of the restricted solid-on-solid model coupled with the Langmuir adsorbates which we regard as two-dimensional lattice gas without lateral interaction.…
Anisotropic Antiferromagnetic Spin Chains in a Transverse Field: Reentrant Behavior of the Staggered Magnetization
Yasuhiro Hieida, Kouichi Okunishi, Yasuhiro Akutsu
We investigate one-dimensional S=1/2 and S=1 antiferromagnetic quantum spin chains with easy-axis anisotropies in a transverse field. We calculate both the uniform magnetization an…
Vertical Density Matrix Algorithm: A Higher-Dimensional Numerical Renormalization Scheme based on the Tensor Product State Ansatz
Nobuya Maeshima, Yasuhiro Hieida, Yasuhiro Akutsu +2
We present a new algorithm to calculate the thermodynamic quantities of three-dimensional (3D) classical statistical systems, based on the ideas of the tensor product state and the…
Trimer-Monomer Mixture Problem on (111) Surface of Diamond Structure
Noriko Akutsu, Yasuhiro Akutsu
We consider a system of trimers and monomers on the triangular lattice, which describes the adsorption problem on (111) surface of diamond structure. We give a mapping…
Statistical Mechanics of the Vicinal Surfaces with Adsorption
Noriko Akutsu, Yasuhiro Akutsu, Takao Yamamoto
We study the vicinal surface with adsorption below the roughening temperature, using the restricted solid-on-solid model coupled with the Ising model. By the product-wavefunction r…