Speaker
Anne Curtis
Description
We will report on absolute E3 frequency measurements and E3/E2 optical frequency ratio measurements in $^{171}$Yb$^+$, local $^{171}$Yb$^+$/ $^{87}$Sr clock frequency ratios, related uncertainty budgets, and improvements in automation and robust operation of the $^{171}$Yb$^+$ clock system at NPL. We will also show how these measurement results have been used to constrain temporal variation of the fine structure constant and exclude regions of parameter space in theories beyond the Standard Model, such as those which include ultralight scalar dark matter.
Primary authors
Adam Parsons
(NPL)
Alexandra Tofful
(NPL)
An Tran
(NPL)
Anne Curtis
Billy Robertson
(NPL)
Helen Margolis
(NPL)
Jacob Tunesi
(NPL)
Marco Schioppo
(NPL)
Rachel Godun
(NPL)
