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SUMMARY:Bragg spectroscopy of an interacting Bose-Einstein condensate - Ko
 nrad Viebahn (Cavendish Lab)
DTSTART:20150727T143000Z
DTEND:20150727T160000Z
UID:TALK60247@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:In this work we present a Bragg spectroscopy setup for ultraco
 ld atom experiments. Selective Bragg diffraction is a powerful tool to mea
 sure physical properties of an atomic cloud\, such as the dispersion relat
 ion\, the momentum distribution\, coherence properties and interaction ene
 rgy.\nHere we show how Bragg spectroscopy can be used to probe interaction
  energy. Making use of a 39K Bose-Einstein condensate with tuneable intera
 ctions we are able to quantitatively determine the dependence of the Bragg
  resonance as a function of interaction strength. Not only do we find good
  agreement with theory in lowest-order approximation but we also are able 
 to identify the onset of higher-order corrections.\n
LOCATION:Ryle Seminar (Rutherford 930)
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