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7 papers · 1 filter
Anomalous minimization for critical velocity of superflow along a step potential
Akihiro Kanjo, Hiromitsu Takeuchi
To reveal a microscopic mechanism for the anomalous minimization and dependence of the superfluid critical velocity on a moving obstacle potential in a atomic Bose-Einstein condens…
Stability of current-carrying states in hard-core bosons with long-range hopping on a square lattice
Yoshihiro Yabuuchi, Ippei Danshita
We investigate the stability of current-carrying states with quasi-momentum in the Bose-condensed phase of the hard-core Bose-Hubbard model on a square lattice, where particles…
Dynamic scaling of vorticity in phase-separating superfluid mixtures
Ryuta Ito, Hiromitsu Takeuchi
Recently, it has been experimentally confirmed that non-equilibrium dynamics of phase separation in strongly ferromagnetic Bose-Einstein condensates of Li atoms obey the dynami…
Proper Orthogonal Decomposition of a Superfluid Turbulent Wake
Sota Yoneda, Hiromitsu Takeuchi
Superfluid turbulent wakes behind a square prism are studied theoretically and numerically by proper orthogonal decomposition (POD). POD is a data science approach that can efficie…
Vortex Mass in Superfluid Fermi Gases along the BEC-BCS Crossover
Lucas Levrouw, Hiromitsu Takeuchi, Jacques Tempere
Vortex mass is a key concept in the study of superfluid dynamics, referring to the inertia of vortices in a superfluid, which affects their motion and behavior. Despite being an im…
Universal Turbulent States of Miscible Two-Component Bose-Einstein Condensates
Issei Doki, Makoto Tsubota
We investigate turbulence in miscible two-component Bose-Einstein condensates confined in a box potential using the coupled Gross-Pitaevskii equations. Turbulence is driven by an o…