Abstract
We have observed a three-dimensional gyroscopic effect associated with a vortex in a dilute Bose-Einstein condensed gas. A condensate with a vortex possesses a single quantum of circulation, and this causes the plane of oscillation of the scissors mode to precess around the vortex line. We have measured the precession rate of the scissors oscillation. From this we deduced the angular momentum associated with the vortex line and found a value close to per particle, as predicted for a superfluid.
- Received 27 September 2002
DOI:https://doi.org/10.1103/PhysRevLett.91.090403
©2003 American Physical Society