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Nambu-Goldstone Mode in a Rotating Dilute Bose-Einstein Condensate

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arxiv cond-mat/0401251 v2 pith:S2VRSGY3 submitted 2004-01-15 cond-mat.mes-hall cond-mat.stat-mech

Masahito Ueda , Tatsuya Nakajima This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.stat-mech
keywords condensatemodenambu-goldstonebose-einsteindilutevortexadmixtureapproaches
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The Nambu-Goldstone mode, associated with vortex nucleation in a harmonically confined, two-dimensional dilute Bose-Einstein condensate, is identified with the lowest-lying envelope of octupole-mode branches, which are separated from each other by the admixture of quadrupolar excitations. As the vortex approaches the center of the condensate and the system's axisymmetry is restored, the Nambu-Goldstone mode becomes massive due to its coupling to higher rotational bands.

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