Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2005-08-23
Phys. Rev. A 72, 053624 (2005)
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
10.1103/PhysRevA.72.053624
It has been demonstrated experimentally that non-axially symmetric vortices precess around the centre of a Bose-Einstein condensate. Two types of single vortex states have been observed, usually referred to as the S-vortex and the U-vortex. We study theoretically the single vortex excitations in spherical and elongated condensates as a function of the interaction strength. We solve numerically the Gross-Pitaevskii equation and calculate the angular momentum as a function of precession frequency. The existence of two types of vortices means that we have two different precession frequencies for each angular momentum value. As the interaction strength increases the vortex lines bend and the precession frequencies shift to lower values. We establish that for given angular momentum the S-vortex has higher energy than the U-vortex in a rotating elongated condensate. We show that the S-vortex is related to the solitonic vortex which is a nonlinear excitation in the nonrotating system. For small interaction strengths the S-vortex is related to the dark soliton. In the dilute limit a lowest Landau level calculation provides an analytic description of these vortex modes in terms of the harmonic oscillator states.
Cooper Nigel R.
Komineas Stavros
Papanicolaou Nikos
No associations
LandOfFree
Single vortex states in a confined 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 Single vortex states in a confined Bose-Einstein condensate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single vortex states in a confined Bose-Einstein condensate will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-268427