Formation of quantized vortices in a gaseous Bose-Einstein condensate

Details Formation of quantized vortices in a gaseous Bose-Einstein condensate Formation of quantized vortices in a gaseous Bose-Einstein condensate

2001-04-12

arxiv.org/abs/cond-mat/0104218v2

Physics

Condensed Matter

Statistical Mechanics

19 pages, 8 figures. To be published in Proceedings of Trapped particles and fundamental physics Workshop (Les Houches 2001).

Scientific paper

Using a focused laser beam we stir a Bose-Einstein condensate confined in a magnetic trap. When the stirring frequency lies near the transverse quadrupolar mode resonance we observe the nucleation of vortices. When several vortices are nucleated, they arrange themselves in regular Abrikosov arrays, and in the limit of large quantum number the lattice structure is shown to produce a quantum velocity field approaching that for classical, rigid body rotation. Using a percussive excitation of the condensate, we measure the angular momentum of the condensate with vortices present and study the nucleation band as a function of the stirring intensity and geometry. We find that with only quadratic terms in the rotating perturbation the nucleation band is located around the quadrupolar resonance and has a width that increases with the strength of the stirring perturbation. However, when the potential includes cubic terms, the nucleation band broadens to include the hexapolar resonance as well. The results presented here demonstrate that the nucleation of vortices in the case of a harmonically trapped BEC is driven by the resonant excitation of the rotating quadrupolar mode, or by higher order rotating surface modes when the rotating perturbation includes the corresponding terms.

Affiliated with

Also associated with

No associations

Rating

Formation of quantized vortices in a gaseous Bose-Einstein condensate does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Formation of quantized vortices in a gaseous Bose-Einstein condensate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of quantized vortices in a gaseous Bose-Einstein condensate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-441465