Observation of Tkachenko Oscillations in Rapidly Rotating Bose-Einstein Condensates

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dc.creatorCoddington, I.
dc.creatorEngels, P.
dc.creatorSchweikhard, V.
dc.creatorCornell, E. A.
dc.date2003-05-01
dc.date2003-09-22
dc.date.accessioned2026-07-07T12:55:46Z
dc.date.available2026-07-07T12:55:46Z
dc.descriptionWe directly image Tkachenko waves in a vortex lattice in a dilute-gas Bose-Einstein condensate. The low (sub-Hz) resonant frequencies are a consequence of the small but nonvanishing elastic shear modulus of the vortex-filled superfluid. The frequencies are measured for rotation rates as high as 98% of the centrifugal limit for the harmonically confined gas. Agreement with a hydrodynamic theory worsens with increasing rotation rate, perhaps due to the increasing fraction of the volume displaced by the vortex cores. We also observe two low-lying m=0 longitudinal modes at about 20 times higher frequency.
dc.description5 pages, 4figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0305008
dc.identifierhttp://arxiv.org/abs/cond-mat/0305008
dc.identifierPhys.Rev.Lett.91:100402,2003
dc.identifierdoi:10.1103/PhysRevLett.91.100402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224364
dc.subjectSoft Condensed Matter
dc.titleObservation of Tkachenko Oscillations in Rapidly Rotating Bose-Einstein Condensates
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