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SUMMARY:Physics with Atomic Clocks: Beyond what time is it? - Prof Kurt Gi
 bble (Penn State)
DTSTART:20090518T143000Z
DTEND:20090518T160000Z
UID:TALK18124@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Atomic clocks realize the most accurate measurements of any ki
 nd and are extremely sensitive to incredibly small perturbations. The curr
 ent generation of atomic clocks uses laser-cooling and\, after circumventi
 ng some new problems\, these will realize 100 fold improvements in clock a
 ccuracies. I will describe the basic physics of clocks and several of the 
 new problems. These include frequency shifts due to collisions of the cold
  atoms\, the size of the recoil of an atom when it absorbs a photon\, and 
 juggling many atoms in fountains. Looking forward\, the next generation of
  atomic clocks will utilize optical frequency transitions and an elegant t
 echnology to count the optical frequency (10^15 Hz) ticks of the clock.\n
LOCATION:HEP Seminar Room (980) Rutherford Building\, Cavendish Laboratory
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