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CATEGORIES:AMOP list
SUMMARY:Bragg spectroscopy of a strongly interacting fermi
  gas - Peter Hannaford (Swinburne University\, Aus
 tralia)
DTSTART;TZID=Europe/London:20120628T140000
DTEND;TZID=Europe/London:20120628T150000
UID:TALK38031AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/38031
DESCRIPTION:For sufficiently strong interparticle interactions
  ultracold Fermi gases display universal propertie
 s where the macroscopic parameters become independ
 ent of the microscopic details of of the interatom
 ic potential.  We will describe the application of
  Bragg spectroscopy to probe the dynamic density r
 esponse and spin response of a strongly interactin
 g two-component Fermi gas of lithium-6 atoms confi
 ned in an optical dipole trap. The density respons
 e and spin response allow full characterisation of
  the spin-parallel and spin-antiparallel component
 s of the dynamic and static structure factors. Bra
 gg spectra taken close to unitarity show that shor
 t-range pair correlations remarkably follow a simp
 le universal law based on a single short-range par
 ameter\, the ‘contact’\, over a broad range of mom
 enta and interaction strengths and that these pair
  correlations persist well above the superfluid tr
 ansition temperature. Finally\, we will report on 
 results for the crossover from three to two dimens
 ions for the case of a weakly interacting Fermi ga
 s of lithium-6 atoms confined in a single ‘pancake
 ’ dipole trap
LOCATION:Rutherford building\, Seminar Room B
CONTACT:
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