Phys. Rev. Lett. 91, 090403 (2003) [4 pages]Experimental Observation of a Superfluid Gyroscope in a Dilute Bose-Einstein CondensateReceived 27 September 2002; published 27 August 2003 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 ℏ per particle, as predicted for a superfluid. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.090403
DOI:
10.1103/PhysRevLett.91.090403
PACS:
03.75.Kk, 05.30.Jp, 67.40.Db, 67.90.+z
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