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SUMMARY:Vortex knots in a Bose-Einstein condensate - Proment\, D (Universi
 ty of East Anglia)
DTSTART:20121205T122000Z
DTEND:20121205T123500Z
UID:TALK41862@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:I will present a method for numerically building a quantum vor
 tex knot state in the single scalar field wave function of a Bose-Einstein
  condensate. I will show how the two topologically simplest vortex knots w
 rapped over a torus evolve and may preserve their shapes by reporting resu
 lts of the integration in time of the governing Gross-Pitaevskii equation.
  \n\nIn particular\, I will focus on how the velocity of a vortex knot dep
 ends on the ratio of poloidal and toroidal radius: in a first approximatio
 n it is linear and\, for smaller ratio\, the knot travels faster. Finally\
 , I will display mechanisms of vortex breaking by reconnections which prod
 uce simpler vortex rings whose number depends on initial knot topology. \n
 \n\n
LOCATION:Seminar Room 1\, Newton Institute
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