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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:2
UID:UW-Physics-Event-9052
DTSTART:20250206T170000Z
DTEND:20250206T180000Z
DTSTAMP:20260413T202617Z
LAST-MODIFIED:20250131T161148Z
LOCATION:5310 Chamberlin
SUMMARY:Adventures in optical clocks: quantum engineering\, fundamenta
 l physics\, and new frontiers\, Atomic Physics Seminar\, Dr. Tobias Bo
 thwell\, NIST Boulder
DESCRIPTION:Optical atomic clocks are exemplary quantum sensors\, comb
 ining robust environmental decoupling with exquisite laser phase sensi
 tivity. By leveraging new quantum engineering techniques\, today’s o
 ptical clocks now realize a staggering 19 digits of accuracy and preci
 sion. Beyond timekeeping\, this new level of performance promises nove
 l tests of fundamental physics\, from general relativity to dark matte
 r. Motivated by these advances\, I will show how carefully controlling
  ensembles of neutral atoms tightly confined within optical lattices c
 ontinues to push the limits of frequency metrology. I will first intro
 duce optical lattice clocks (OLCs)\, which set precision records by le
 veraging thousands of trapped alkaline-earth-like atoms. Using stronti
 um in a shallow lattice regime allows us to control atomic interaction
 s and realize unprecedented measurement capability\, resolving the gra
 vitational redshift within our millimeter-scale atomic sample. In ytte
 rbium we have developed and employed multiple ultracold ensembles with
 in a standard OLC to measure accuracy-limiting differential atomic pol
 arizabilities. Recently we have even operated OLCs outside the lab\, w
 ith plans for measuring gravitational redshifts atop nearby mountains.
  Looking forward\, the OLC architecture can be extended beyond alkalin
 e-earth-like atoms\, enabling a single-species clock network to explor
 e new frontiers in both quantum metrology and fundamental physics.
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URL:https://www.physics.wisc.edu/events/?id=9052
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