Scissors mode of an expanding Bose-Einstein condensate

Year: 2003

Authors: Modugno M., Modugno G., Roati G., Fort C., Inguscio M.

Autors Affiliation: Univ Florence, INFM, LENS, I-50019 Sesto Fiorentino, Italy; Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy; Univ Trent, Dipartimento Fis, I-38050 Trento, Italy.

Abstract: We study the scissors mode of a free-expanding Bose-Einstein condensate. We find that the irrotational character of the superfluid flow within the condensate has dramatic consequences on the evolution of the scissors oscillation. After a short expansion the oscillation is amplified and distorted, while asymptotically it recovers its initial sinusoidal behavior, with an enhanced amplitude. We investigate this phenomenon by using a technique to excite the scissors mode in a condensate held in a magnetostatic potential.

Journal/Review: PHYSICAL REVIEW A

Volume: 67 (2)      Pages from: 23608-1  to: 23608-4

KeyWords: Superfluidity; Vortices; Dynamics; Inertia; Moment
DOI: 10.1103/PhysRevA.67.023608

Citations: 16
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