Feder, D.
, Collins, L.
and Clark, C.
(2008),
Non-quantization of Current in an Annular Bose-Einstein Condensate, Physical Review Letters
(Accessed March 13, 2025)
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Non-quantization of Current in an Annular Bose-Einstein Condensate
Published
Author(s)
, L A. Collins,
Abstract
The circulating states of a Bose-Einstein condensate confined in an annulus are investigated both analytically and numerically. It is demonstrated that while single-valuedness of the condensate wavefunction ensures the quantization of circulation in this geometry, it does not guarantee the quantization of angular momentum nor specify the current: the localized phase offsets associated with dark solitons may compensate for any mismatch in the condensate phase at a boundary. We explore the implications for recent attempts to excite circulating currents by phase imprinting.Citation
Physical Review Letters
Pub Type
Journals
Keywords
Bose-Einstein condensation, quantized circulation, solitons, superfluidity
Citation
Issues
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Created October 16, 2008