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SUMMARY:Electron Microscopy of Ultracold Quantum Gases - Professor Herwig 
 Ott (Technische Universitat Kaiserslautern)
DTSTART:20091019T143000Z
DTEND:20091019T160000Z
UID:TALK17863@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Scanning electron microscopy is routinely used to study solid 
 objects on a nanometer scale. Applied to ultracold quantum gases it consti
 tutes a powerful imaging and manipulation technique that combines single a
 tom sensitivity with high spatial resolution. \nWe have adapted a scanning
  electron microscope for the study of Bose-Einstein condensates of rubidiu
 m atoms. The focussed electron beam ionizes the atoms which are subsequent
 ly detected. The technique allows for high precision density measurements 
 of the trapped gas with a spatial resolution of better than 150 nm. Loadin
 g the condensate in a two-dimensional optical lattice with 600 nm period w
 e demonstrate single site addressability and show that one can produce arb
 itrary patterns of occupied lattice sites. Such micro-structured quantum g
 ases might become a versatile resource for the study of mesoscopic quantum
  systems and future applications in quantum simulation and quantum informa
 tion processing.\nUltimately\, we want to employ this technique to make sn
 apshots of the many-body wave function and to get in situ access to the qu
 antum correlations of bulk\, lattice and low-dimensional quantum systems. 
 \n\n
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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