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SUMMARY:Phase transitions from unconventional vortices in spinor Bose cond
 ensates - Prof Joel Moore (UC Berkeley)
DTSTART:20080505T143000Z
DTEND:20080505T153000Z
UID:TALK11103@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Bose condensates of ultracold atoms with nonzero total spin sh
 ow ordered phases that combine superfluid and magnetic order in different 
 ways.  The topological defects (vortices and their generalizations) in suc
 h phases can be directly observed in experiments and are predicted to have
  some surprising consequences.   In the two-dimensional polar condensate o
 f sodium atoms\, there is an unusual Berezinskii-Kosterlitz-Thouless trans
 ition into a paired phase induced by thermal fluctuations\; this talk give
 s an analytical argument for this scenario as well as Monte Carlo results.
   In a rotated spinor condensate\, the tunable interaction between vortice
 s leads to a complicated vortex lattice phase diagram\, including aperiodi
 c structures as well as true lattices.  The last part of the talk discusse
 s some open questions raised by current experiments on condensate dynamics
 .\n\n
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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