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SUMMARY:Laser cooling of atoms using multi-photon transitions - Saijun Wu 
 (Trey Porto Lab\, NIST)
DTSTART:20100518T130000Z
DTEND:20100518T140000Z
UID:TALK24828@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Laser cooling relies on applying velocity selective optical fo
 rces on an ensemble of atoms to increase an atomic sample's phase space de
 nsity\, thereby cooling the atoms. In nearly all laser cooling schemes use
 d so far\, both the velocity selectivity and the radiation forces were acc
 omplished using optical transitions that couple ground atomic states to ex
 cited states. In this talk I will present some of our recent work on laser
  cooling using multi-photon and excited state transitions. I will discuss 
 some unexpected observations in a two-color Magneto-Optical Trap\, and the
  applicability of similar techniques to laser cooling of certain "difficul
 t" atoms\, such as (anti)hydrogen.\n
LOCATION:Rutherford building\, Seminar Room B
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