Title :
Evaporative cooling of cesium in a surface trap
Author :
Hammes, M. ; Rychtarik, D. ; Druzhinina, V. ; Grimm, R.
Author_Institution :
MPI fur Kernphys., Heidelberg, Germany
Abstract :
Summary form only given. Optical dipole traps facilitate storage of atoms independent of their magnetic sub-state. Trapping at high densities is thus not limited by two-body collisions changing the spin state of the atom, which in the particular case of cesium have so far prevented the attainment of Bose-Einstein condensation in magnetic traps. For evaporative cooling of Cs we use the gravito-optical surface trap (GOST) which consists of a horizontal evanescent-wave (EW) atom mirror in combination with a blue-detuned hollow beam (HE) for transverse confinement. Starting conditions for evaporative cooling are prepared by optical cooling, based on inelastic reflections from the EW.
Keywords :
Bose-Einstein condensation; atom-photon collisions; atomic beams; caesium; evaporation; laser cooling; mirrors; particle optics; particle traps; quantum optics; radiation pressure; Bose-Einstein condensation; Cs; atomic storage; blue-detuned hollow beam; evaporative cooling; gravito-optical surface trap; horizontal evanescent-wave atom mirror; inelastic reflections; magnetic sub-state; magnetic traps; optical cooling; optical dipole traps; spin state; surface trap; transverse confinement; two-body collisions; Atom lasers; Atom optics; Atomic beams; Atomic measurements; Charge carrier processes; Cooling; Magnetic confinement; Optical scattering; Optical sensors; Stationary state;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.907976
