1,323 research outputs found
Vortices and turbulence in trapped atomic condensates
After over a decade of experiments generating and studying the physics of
quantized vortices in atomic gas Bose-Einstein condensates, research is
beginning to focus on the roles of vortices in quantum turbulence, as well as
other measures of quantum turbulence in atomic condensates. Such research
directions have the potential to uncover new insights into quantum turbulence,
vortices and superfluidity, and also explore the similarities and differences
between quantum and classical turbulence in entirely new settings. Here we
present a critical assessment of theoretical and experimental studies in this
emerging field of quantum turbulence in atomic condensates
Dynamic Critical Phenomena in Trapped Bose Gases
Nonlinear dynamics of a trapped Bose-Einstein condensate, subject to the
action of a resonant external field, is studied. This field produces a
spatio-temporal modulation of the trapping potential with the frequency close
to the transition frequency between the ground state and a higher energy level.
The evolution equations of fractional populations display a kind of critical
phenomena at a critical line on the manifold of the system parameters. It is
demonstrated that there exists a direct analogy between dynamical instability
at this line and critical phenomena at a critical line of a related averaged
system.Comment: Latex file, 7 pages, no figure
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