Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 14, Pages 2857-2860Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.2857
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We have observed and characterized the dynamics of singly quantized vortices in dilute-gas Bose-Einstein condensates. Our condensates are produced in a superposition of two internal states of Rb-87, with one state supporting a vortex and the other filling the vortex core. Subsequently, the state filling the core can be partially or completely removed, reducing the radius of the core by as much as a factor of 13, all the way down to its bare value of the healing length. The corresponding superfluid rotation rates, evaluated at the core radius, vary by a factor of 150, but the precession frequency of the vortex core about the condensate axis changes by only a factor of 2.
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