Article
Consequence of Superfluidity on the Expansion of a Rotating Bose-Einstein Condensate
Physical Review Letters
Document Type
Article
Publication Date
1-31-2002
DOI
10.1103/PhysRevLett.88.070405
Disciplines
Abstract
We propose an easily detectable signature of superfluidity in rotating, vortex-free gaseous Bose-Einstein condensates. We have studied the time evolution of the expansion of such a condensate after it is released from the confining trap. We find that if such a condensate is not initially rotating, then at some moment it will instantaneously achieve a circular cross section. If the condensate is initially rotating its irrotational flow and the conservation of angular momentum prevent the released condensate from attaining a circular cross section, since the instantaneous moment of inertia is then proportional to the asymmetry of this cross section.
Citation Information
Mark Edwards, Charles W. Clark, P. Pedri, L. Pitaevskii, et al.. "Consequence of Superfluidity on the Expansion of a Rotating Bose-Einstein Condensate" Physical Review Letters Vol. 88 Iss. 7 (2002) p. 070405-1 - 070405-4 ISSN: 0031-9007 Available at: http://works.bepress.com/mark_edwards1/45/
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