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7 papers · 2 filters
Multifractal Behavior of the Two-Dimensional Ising Model at small spatio-temporal scales
W. Sakikawa, O. Narikiyo
The distribution of the fractal dimension of the two-dimensional Ising model at the critical temperature measured by the Monte-Carlo simulation is discussed. At small spatio-tempor…
Universality class of S=1/2 quantum spin ladder system with the four spin exchange
Keigo Hijii, Kiyohide Nomura
We study s=1/2 Heisenberg spin ladder with the four spin exchange. Combining numerical results with the conformal field theory(CFT), we find a phase transition with central charge…
Fluctuation Dissipation Relation for a Langevin Model with Multiplicative Noise
H. Sakaguchi
A random multiplicative process with additive noise is described by a Langevin equation. We show that the fluctuation-dissipation relation is satisfied in the Langevin model, if th…
Collisional Granular Flow as a Micropolar Fluid
Namiko Mitarai, Hisao Hayakawa, Hiizu Nakanishi
We show that a micropolar fluid model successfully describes collisional granular flows on a slope. A micropolar fluid is the fluid with internal structures in which coupling betwe…
Bifurcations of a driven granular system under gravity
Masaharu Isobe
Molecular dynamics study on the granular bifurcation in a simple model is presented. The model consists of hard disks, which undergo inelastic collisions; the system is under the u…
Instability of dilute granular flow on rough slope
Namiko Mitarai, Hiizu Nakanishi
We study numerically the stability of granular flow on a rough slope in collisional flow regime in the two-dimension. We examine the density dependence of the flowing behavior in l…