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  • Ramanathan, A., et al. (author)
  • Superflow in a toroidal bose-einstein condensate : an atom circuit with a tunable weak link
  • 2011
  • In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 106:13
  • Journal article (peer-reviewed)abstract
    • We have created a long-lived (∼40s) persistent current in a toroidal Bose-Einstein condensate held in an all-optical trap. A repulsive optical barrier across one side of the torus creates a tunable weak link in the condensate circuit, which can affect the current around the loop. Superflow stops abruptly at a barrier strength such that the local flow velocity at the barrier exceeds a critical velocity. The measured critical velocity is consistent with dissipation due to the creation of vortex-antivortex pairs. This system is the first realization of an elementary closed-loop atom circuit.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Ramanathan, A. (1)
Zelan, Martin, 1981- (1)
Lobb, C. J. (1)
Phillips, W D (1)
Wright, K.C. (1)
Muniz, S.R. (1)
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Hill, W.T. (1)
Helmerson, K. (1)
Campbell, G.K. (1)
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University
Umeå University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2011 (1)

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