443 citations · 2.6k across the 29 of their papers we have counts for
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Spin decoherence by spacetime curvature
Hiroaki Terashima, Masahito Ueda
A decoherence mechanism caused by spacetime curvature is discussed. The spin state of a particle is shown to decohere if only the particle moves in a curved spacetime. In particula…
Energy gaps and roton structure above the nu=1/2 Laughlin state of a rotating dilute Bose-Einstein condensate
Tatsuya Nakajima, Masahito Ueda
Exact diagonalization study of a rotating dilute Bose-Einstein condensate reveals that as the first vortex enters the system the degeneracy of the low-energy yrast spectrum is lift…
Quadrupole-scissors modes and nonlinear mode coupling in trapped two-component Bose-Einstein condensates
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
We theoretically investigate quadrupolar collective excitations in two-component Bose-Einstein condensates and their nonlinear dynamics associated with harmonic generation and mode…
Einstein-Podolsky-Rosen correlation in gravitational field
Hiroaki Terashima, Masahito Ueda
For quantum communication in a gravitational field, the properties of the Einstein-Podolsky-Rosen (EPR) correlation are studied within the framework of general relativity. Accelera…
Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Bose-Einstein condensates with attractive interactions
Hiroki Saito, Masahito Ueda
The dynamical instabilities and ensuing dynamics of singly- and doubly-quantized vortex states of Bose-Einstein condensates with attractive interactions are investigated using full…
Stability of the quantized circulation of an attractive Bose-Einstein condensate in a rotating torus
Rina Kanamoto, Hiroki Saito, Masahito Ueda
We investigate rotational properties of a system of bosons with attractive interactions confined in a one-dimensional torus. Two kinds of ground states, uniform-density and bright-…