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.
Two atomic species superfluid / G. MODUGNO; M. MODUGNO; F. RIBOLI; G. ROATI; M. INGUSCIO. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 89:(2002), pp. 0-0. [10.1103/PhysRevA.67.023608]
Two atomic species superfluid
MODUGNO, GIOVANNI
Investigation
;MODUGNO, MICHELE
;INGUSCIO, MASSIMO
2002
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.
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