NF - 11 - 1 - 0202 60300 - PH - DRP . 21 Conference Proceeding

Blackbody effects in the Yb lattice clock Report Title 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?D?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. Conference Name: 2012 IEEE International Frequency Control Symposium, Baltimore, Maryland, May, 2012 Conference Date: May 21, 2011 Blackbody effects in the Yb optical lattice clock A. D. Ludlow1, J. A. Sherman1, N. D. Lemke1,2, K. Beloy1, N. Hinkley1,2, M. Pizzocaro1,3, R. W. Fox1, C. W. Oates1 National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA University of Colorado, Department of Physics, Boulder, CO 80309, USA Politecnico di Torino, Corso duca degli Abruzzi 24, 10125 Torino, Italy Email: [email protected] Abstract—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 〈6s5dD1‖D‖6s6pP0〉 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.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 〈6s5dD1‖D‖6s6pP0〉 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.