Document Type

Article

Publication Date

Fall 10-2-2000

Publication Title

Physical Review Letters

ISSN

0031-9007

Volume

85

Issue

14

First Page

2857

Last Page

2860

DOI

10.1103/PhysRevLett.85.2857

Abstract

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 87Rb, 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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