Lattice-Induced Frequency Shifts in Sr Optical Lattice Clocks at the 10{sup -17} Level
- LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, 61 avenue de l'Observatoire, 75014 Paris (France)
We present a comprehensive study of the frequency shifts associated with the lattice potential in a Sr lattice clock by comparing two such clocks with a frequency stability reaching 5x10{sup -17} after a 1 h integration time. We put the first experimental upper bound on the multipolar M1 and E2 interactions, significantly smaller than the recently predicted theoretical upper limit, and give a 30-fold improved upper limit on the effect of hyperpolarizability. Finally, we report on the first observation of the vector and tensor shifts in a Sr lattice clock. Combining these measurements, we show that all known lattice related perturbations will not affect the clock accuracy down to the 10{sup -17} level, even for lattices as deep as 150 recoil energies.
- OSTI ID:
- 21538362
- Journal Information:
- Physical Review Letters, Vol. 106, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.106.210801; (c) 2011 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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