We report a high accuracy measurement of the differential static polarizability for the clock transition in a Yb lattice clock, a key parameter for determining the blackbody BBR) shift of this transition. We further report efforts to determine the 6s5d3D1-6s6p3P0 reduced dipole matrix element, a critical ingredient in the non-static correction to the BBR shift. In all, we have reduced the largest uncertainty in the Yb lattice clock (that stemming from the BBR shift) by an order of magnitude.
Proceedings Title: Proceedings of the 2012 IEEE International Frequency Control Symposium
Conference Dates: May 21-24, 2012
Conference Location: Baltimore, MD
Conference Title: 2012 IEEE International Frequency Control Symposium
Pub Type: Conferences
atomic clock, blackbody, frequency standard, lattice clock, optical clock, optical lattice, Stark, ytterbium