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SUMMARY:Shaken to order: Dressed matter waves in driven periodic potential
 s - Dr Oliver Morsch (University of Pisa)
DTSTART:20090216T153000Z
DTEND:20090216T170000Z
UID:TALK15748@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Strong driving of a periodic potential can lead to a reduction
  or even supression of tunneling between the lattices wells. In our experi
 ments with Bose-Einstein condensates in strongly driven ("shaken") optical
  lattices we have demonstrated this tunneling suppression and found that t
 he coherence of the wavefunction can be preserved if the parameters of the
  driving are chosen appropriately. This allowed us to load the condensate 
 adiabatically into a single Floquet state of the driven system and to expl
 ore the properties of the resulting "dressed matter waves". In particular\
 , in a three-dimensional lattice we have seen strong evidence that the sup
 erfluid to Mott insulator quantum phase transiition can be induced through
  the strong driving.
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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