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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-8286
DTSTART:20230530T190000Z
DTEND:20230530T210000Z
DTSTAMP:20260414T033241Z
LAST-MODIFIED:20230530T152328Z
LOCATION:4274 Chamberlin
SUMMARY:Precision Measurements with a Multiplexed Optical Lattice Cloc
 k\, Graduate Program Event\, Jack Dolde\, Department of Physics Gradua
 te Student
DESCRIPTION:Optical atomic clock improvement has advanced the fields o
 f timekeeping\, metrology\, and quantum science. However\, most curren
 t optical atomic clock stabilities are limited by the stability of the
  interrogating laser\, rather than the atomic reference. In order to r
 educe the limiting effects of laser stability on precision metrology e
 xperiments with optical atomic clocks\, we developed a multiplexing te
 chnique that allows us to simultaneously probe multiple atomic ensembl
 es separated by 1 cm or less along the axis of a vertical 1-D optical 
 lattice. Simultaneous probing of these ensembles allows common-mode re
 jection of laser frequency noise\, allowing us to demonstrate a differ
 ential instability of 9.7(4)10^−18/√τ and a differential frequenc
 y uncertainty of 8.910^-20 after 3.3 hours of averaging. We then load 
 5 separate clock ensembles across 1 cm to create a miniature clock net
 work\, and subsequently tested the gravitational redshift effect predi
 cted by general relativity across 1 cm of height difference. Currently
 \, we are working to measure the natural linewidth of the 87Sr 1S0-3P0
  clock transition through direct radiative decay observations.
URL:https://www.physics.wisc.edu/events/?id=8286
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