Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Changhyun Ryu; Mikkel Andersen; Pierre Clade; Vasant Natarajan; Kristian Helmerson; William D. Phillips;|
|Title:||Observation of Persistent Flow of a Bose-Einstein Condensate in a Toroidal Trap|
|Abstract:||We have observed the persistent flow of Bose-condensed atoms in a toroidal trap. The flow persists without decay for up to 10 s, limited only by experimental factors such as drift and trap lifetime. The quantized rotation was initiated by transferring one unit, h, of the orbital angular momentum from Laguerre-Gaussian photons to the atoms. Stable flow was only possible when the trap was multiply-connected, and was observed with a BEC fraction as small as 15%. We also created flow with two units of angular momentum, and observed its splitting into two singly-charged vortices when the trap geometry was changed from multiply- to simply-connected.|
|Citation:||Physical Review Letters|
|Keywords:||BEC,persistent flow,superfluidity,toroidal,vortex pinning|