5 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…
Stiffening Transition in 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. We calculate the step tension…
Universal Asymptotic Eigenvalue Distribution of Density Matrices and the Corner Transfer Matrices in the Thermodynamic Limit
Kouichi Okunishi, Yasuhiro Hieida, Yasuhiro Akutsu
We study the asymptotic behavior of the eigenvalue distribution of the Baxter's corner transfer matrix (CTM) and the density matrix (DM) in the White's density-matrix renormalizati…
Delta-Function Bose Gas Picture of S=1 Antiferromagnetic Quantum Spin Chains Near Critical Fields
Kouichi Okunishi, Yasuhiro Hieida, Yasuhiro Akutsu
We study the zero-temperature magnetization curve (M-H curve) of the S=1 bilinear-biquadratic spin chain, whose Hamiltonian is given by $H=\sum_{i} S_i S_{i+1}+β(S_iS_{i+1})^2 with…
Universality of the Tangential Shape Exponent at the Facet Edge of a Crystal
Y. Akutsu, N. Akutsu, T. Yamamoto
Below the roughening temperature, the equilibrium crystal shape (ECS) is composed of both facets and a smoothly curved surface. As for the ``normal'' profile (perpendicular to the…