Multipolar theory of blackbody radiation shift of atomic energy levels and its implications for optical lattice clocks

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.020502· OSTI ID:20853006

Porsev, Sergey G ^[1]; Derevianko, Andrei ^[1]

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1. Department of Physics, University of Nevada, Reno, Nevada 89557 (United States)

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.

• OSTI ID: 20853006
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
ATOMIC CLOCKS
ATOMS
BLACKBODY RADIATION
CORRECTIONS
ELECTRIC DIPOLES
ENERGY LEVELS
FINE STRUCTURE
MANY-BODY PROBLEM
RELATIVISTIC RANGE
WAVELENGTHS