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8 papers · 2 filters
Bernoulli's formula and Poisson's equations for a confined quantum gas: Effects due to a moving piston
Katsuhiro Nakamura, Zarifboy A. Sobirov, Davron U. Matrasulov +1
We study a nonequilibrium equation of states of an ideal quantum gas confined in the cavity under a moving piston with a small but finite velocity in the case that the cavity wall…
Dynamics of inertial vortices in multi-component Bose-Einstein condensates
Katsuhiro Nakamura, Doniyor Babajanov, Davron Matrasulov +1
With use of the nonlinear Schr{ö}dinger (or Gross-Pitaevskii) equation with strong repulsive cubic nonlinearity, dynamics of multi-component Bose-Einstein condensates (BECs) with a…
Hydrodynamic Instability and Turbulence in Quantum Fluids
Makoto Tsubota
Superfluid turbulence consisting of quantized vortices is called quantum turbulence (QT). Quantum turbulence and quantized vortices were discovered in superfluid He about 50 ye…
Tachyon Condensation Due to Domain-Wall Annihilation in Bose-Einstein Condensates
Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota +1
We show theoretically that a domain-wall annihilation in two-component Bose-Einstein condensates causes tachyon condensation accompanied by spontaneous symmetry breaking in a two-d…
Spin Turbulence in a Trapped Spin-1 Spinor Bose--Einstein Condensate
Kazuya Fujimoto, Makoto Tsubota
We numerically study spin turbulence in a two-dimensional trapped spin-1 spinor Bose--Einstein condensate, focusing on the energy spectrum. The spin turbulence in the trapped syste…
Equation of state for the one-dimensional attractive δ-potential Bose gas in the weak-coupling regime
Tsubasa Ichikawa, Izumi Tsutsui, Nobuhiro Yonezawa
Approximated formulae for real quasi-momentum and the associated energy spectrum are presented for one-dimensional Bose gas with weak attractive contact interactions. On the basis…