224 citations · 1.9k across the 59 of their papers we have counts for
59 papers
BKT-like Correlation Scaling and Twist Responses in a One-Dimensional Fractional Ginzburg--Landau Model
Hitomi Endo, Michikazu Kobayashi
We study a one-dimensional fractional Ginzburg--Landau model whose quadratic part has Fourier multiplier , focusing on the marginal case . This dispersion yields…
Violation of local equilibrium thermodynamics in one-dimensional Hamiltonian-Potts model
Hitomi Endo, Michikazu Kobayashi
We investigate nonequilibrium phase coexistence associated with a first-order phase transition by numerically studying a one-dimensional Hamiltonian-Potts model with fractional spa…
Quantum Knots that Never Come Untied
Michikazu Kobayashi, Yuta Nozaki, Yuya Koda +1
Lord Kelvin proposed that atoms form hydrodynamic vortex knots. However, they typically untie through reconnections, i. e., local cut-and-slice events, unlike stable vortex unknots…
Phase transition in urban agglomeration and segregation
Taksu Cheon, Michikazu Kobayashi
A model of the urban agglomeration and segregation is formulated, in which two types of agents move around on the square-lattice aligned cells. The model is shown to exhibit, when…
Control of Metastable States by Heat Flux in the Hamiltonian Potts Model
Michikazu Kobayashi, Naoko Nakagawa, Shin-ichi Sasa
The local equilibrium thermodynamics is a basic assumption of macroscopic descriptions of the out of equilibrium dynamics for Hamiltonian systems. We numerically analyze the Hamilt…
Proximity effects of vortices in neutron superfluids in neutron stars: Vortex core transitions and covalent bonding of vortex molecules
Michikazu Kobayashi, Muneto Nitta
Neutron superfluids consisting of neutron pairs with the total angular momentum with spin-triplet and -wave are believed to be realized in neutron star cores. With…