Document Type

Article

Publication Date

Spring 4-2-2001

Publication Title

Physical Review Letters

ISSN

0031-9007

Volume

86

Issue

14

First Page

2922

Last Page

2925

DOI

10.1103/PhysRevLett.86.2922

Abstract

A vortex in a condensate in a nonspherical trapping potential will in general experience a torque. The torque will induce tilting of the direction of the vortex axis. We observe this behavior experimentally and show that by applying small distortions to the trapping potential, we can control the tilting behavior. By suppressing vortex tilt, we have been able to hold the vortex axis along the line of sight for up to 15 sec. Alternatively, we can induce a 180° tilt, effectively reversing the charge on the vortex as observed in the lab frame. We characterize the vortex nondestructively with a surface-wave spectroscopic technique.

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