Hyperpolarizability and Operational Magic Wavelength in an Optical Lattice Clock

Published

December 19, 2017

Author(s)

Roger C. Brown, Nate B. Phillips, Kyle P. Beloy, William F. McGrew, Marco Schioppo, Robert J. Fasano, Gianmaria Milani, Xiaogang Zhang, Nathan M. Hinkley, Holly F. Leopardi, T H. Yoon, Daniele Nicolodi, Tara M. Fortier, Andrew D. Ludlow

Abstract

Optical clocks benefit from tight atomic confinement enabling extended interrogation times as well as Doppler- and recoil-free operation. However, these benefits come at the cost of frequency shifts that, if not properly controlled, may degrade clock accuracy. Numerous theoretical studies have predicted optical lattice clock frequency shifts in a _{171Yb optical lattice clock, we construct a lattice enhancement cavity that exaggerates the light shifts. We find a non-trivial dependence of mean motional state quantum number on trap depth that fundamentally alters the scaling of confinement induced shifts and enables a simplified parametrization of these effects. We experimentally identify an \operational" magic wavelength where frequency shifts are insensitive to changes in trap depth. This measurement constitutes an essential systematic characterization for clock operation at the 10}d18 level and beyond.

Citation

Physical Review Letters

Pub Type

Journals

Keywords

Hyperpolarizability, magic wavelength, optical lattice clock

Citation

Brown, R. , Phillips, N. , Beloy, K. , McGrew, W. , Schioppo, M. , Fasano, R. , Milani, G. , Zhang, X. , Hinkley, N. , Leopardi, H. , Yoon, T. , Nicolodi, D. , Fortier, T. and Ludlow, A. (2017), Hyperpolarizability and Operational Magic Wavelength in an Optical Lattice Clock, Physical Review Letters (Accessed October 13, 2025)