169 citations · 1.2k across the 38 of their papers we have counts for
39 papers
Critical velocity for wake vortex generation behind a plate in a superflow
Haruya Kokubo, Kenichi Kasamatsu, Hiromitsu Takeuchi
We study theoretically the critical velocity for quantum vortex generation by a thin plate-shaped obstacle moving through a uniform Bose-Einstein condensate. Our results base…
Quantum viscosity and the Reynolds similitude in quantum liquid He-II
Hiromitsu Takeuchi
Reynolds similitude, a key concept in hydrodynamics, states that two phenomena of different length scales with a similar geometry are physically identical. Flow properties are univ…
Kelvin wave in miscible two-component Bose-Einstein condensates
Kenichi Kasamatsu, Maki Okada, Hiromitsu Takeuchi
We study the dispersion of Kelvin waves propagating along single- and half-quantum vortices in miscible two-component Bose-Einstein condensates based on the analysis of the Bogolou…
Spin-Current Instability at a Magnetic Domain Wall in a Ferromagnetic Superfluid: a Generation Mechanism of Eccentric Fractional Skyrmions
Hiromitsu Takeuchi
Spinful superfluids of ultracold atoms are ideal for investigating the intrinsic properties of spin current and texture because they are realized in an isolated, nondissipative sys…
Pattern formation of quantum Kelvin-Helmholtz instability in binary superfluids
Haruya Kokubo, Kenichi Kasamatsu, Hiromitsu Takeuchi
We study theoretically nonlinear dynamics induced by shear-flow instability in segregated two-component Bose-Einstein condensates in terms of the Weber number, defined by extending…
Phase diagram of vortices in the polar phase of spin-1 Bose-Einstein condensates
Hiromitsu Takeuchi
The phase diagram of lowest-energy vortices in the polar phase of spin-1 Bose--Einstein condensates is investigated theoretically. Singly quantized vortices are categorized by the…