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Hyperpolarizability and Operational Magic Wavelength in an Optical Lattice Clock



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


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 10d18 level and beyond.
Physical Review Letters


Hyperpolarizability, magic wavelength, optical lattice clock


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 May 21, 2024)


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Created December 19, 2017, Updated March 26, 2018