Structure of excited vortices with higher angular momentum in Bose-Einstein condensates
arXiv:cond-mat/0309487 · doi:10.1103/PhysRevA.70.043626
Abstract
The structure of vortices in Bose-Einstein condensed atomic gases is studied taking into account many-body correlation effects. It is shown that for excited vortices the particle density in the vortex core increases as the angular momentum of the system increases. The core density can increase by several times with only a few percent change in the angular momentum. This result provides an explanation for the observations in which the measured angular momentum is higher than the estimation based on counting the number of vortices, and the visibility of the vortex cores is simultaneously reduced. The calculated density profiles for the excited vortices are in good agreement with experimental measurements.
4 pages, 1 figure
References in corpus (11)
- Vortex formation in a stirred Bose-Einstein condensate
- Vortices in a Bose-Einstein Condensate
- Measurement of the angular momentum of a rotating Bose-Einstein condensate
- Vortex nucleation in Bose-Einstein condensates in an oblate, purely magnetic potential
- Nonequilibrium effects of anisotropic compression applied to vortex lattices in Bose-Einstein condensates
- Vortex bending and tightly packed vortex lattices in Bose-Einstein condensates
- Vortex nucleation and hysteresis phenomena in rotating Bose-Einstein condensates
- The Experimental Observation of a Superfluid Gyroscope in a dilute Bose Condensed Gas
- Dynamics of a single vortex line in a condensate
- Variational wave functions of a vortex in cyclotron motion
- The Structure of a Quantized Vortex in a Bose-Einstein Condensate