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Direct observation of irrotational flow and evidence of superfluidity in a rotating Bose-Einstein condensate.

Abstract:

We have observed the expansion of vortex-free, rotating Bose condensates after their sudden release from a slowly rotating anisotropic trap. Conservation of angular momentum, combined with the constraint of irrotational flow, cause the rotating condensate to expand in a distinctively different way to one released from a static (nonrotating) trap. This difference provides clear experimental evidence of the purely irrotational velocity field associated with a superfluid. We observed this behavi...

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Publication status:
Published

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Authors


Hechenblaikner, G More by this author
Hopkins, SA More by this author
Maragò, OM More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Journal:
Physical review letters
Volume:
88
Issue:
7
Pages:
070406
Publication date:
2002-02-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:5fec0fa8-203a-4fe9-9a72-29f0b68e94aa
Source identifiers:
16947
Local pid:
pubs:16947
Language:
English

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