Multipolar theory of blackbody radiation shift of atomic energy levels and its implications for optical lattice clocks
By S. Porsev, Andrei Derevianko. 2006
193 citations recorded by the source corpus.
Blackbody radiation (BBR) shifts of the {sup 3}P{sub 0}-{sup 1}S{sub 0} clock transition in the divalent atoms Mg, Ca, Sr, and Yb are evaluated. The dominant electric-dipole contributions are computed using accurate relativistic many-body techniques of atomic structure. At room temperatures, the resulting uncertainties in the E1 BBR shifts are large and substantially affect the projected 10{sup -18} fractional accuracy of the optical-lattice-based clocks. A peculiarity of these clocks is that the characteristic BBR wavelength is comparable to the {sup 3}P fine-structure intervals. To evaluate relevant M1 and E2 contributions, a theory of multipolar BBR shifts is developed. The resulting corrections, although presently masked by the uncertainties in the E1 contribution, are required at the 10{sup -18} accuracy goal.
Subfields: Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/9bbe371e27396791fb3bea2f49e9d7a3df988974
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Colloquium: Physics of optical lattice clocks (2010, background): “Most of the discussed uncertainties such as the collisional shifts, the BBR shifts, and hyperpolarizability effects depend on atomic parameters; therefore, they can be improved by a proper choice of specific atom.”