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SUMMARY:Ultracold fermions and bosons in optical lattices - Dr Lucia Hacke
 rmueller University of Mainz
DTSTART:20071105T153000Z
DTEND:20071105T163000Z
UID:TALK8723@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:The manipulation of ultracold fermionic and bosonic quantum ga
 ses in optical\nlattices permits access to a wide field of exciting experi
 ments ranging from\nthe investigation and simulation of solid state physic
 s to quantum computing\nand ultracold chemistry. \nIn our appartus we symp
 athetically cool 40K and 87Rb atoms in a magnetic\nquadrupole trap\, trans
 fer them to a crossed optical trap and cool both\nspecies to quantum degen
 eracy. Subsequently we load pure K samples or K / Rb\nmixtures into a blue
  detuned three dimensional optical lattice. The\ncombination of a red detu
 ned dipole trap with a blue detuned optical lattice\nallows us to vary the
  external confinement while leaving the lattice\npotential unchanged. \nWe
  use this feature to study the transit from a metallic phase to a band\nin
 sulating phase for a single spin species or for a spin mixture. For the Rb
 \n/  K mixtures we control the interaction strength to search for ways to\
 nefficiently K / Rb atom pairs on the lattice sites\, which is an importan
 t\nprerequisite for experiments with heteronuclear molecules. \n
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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