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CATEGORIES:Other Departmental Seminars
SUMMARY:Chasing the Eighteenth Digit: Exploring the Limits
  of Timekeeping - Dr Ian D. Leroux QUEST Institute
  for Experimental Quantum Metrology
DTSTART;TZID=Europe/London:20140403T150000
DTEND;TZID=Europe/London:20140403T160000
UID:TALK51777AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/51777
DESCRIPTION:The accuracy of state-of-the-art optical frequency
  standards based on trapped ions is now limited by
  relativistic effects\, principally the time dilat
 ion due to the ions' thermal motion in the trap an
 d uncertainty on the gravitational red shift.  Aft
 er a brief introduction to timekeeping and optical
  frequency standards in general\, I will discuss t
 he potential of clocks to serve as gravitational p
 otential sensors\, new laser-cooling techniques to
  help control motional time-dilation shifts in ion
  traps at the level required for such relativistic
  geodesy\, and the role that quantum entanglement 
 may play in enhancing the performance of the next 
 generation of frequency standards.
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, Dep
 artment of Physics
CONTACT:Leona Hope-Coles
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