Physics – Atomic Physics
Scientific paper
2006-09-13
Physics
Atomic Physics
7 pages, 2 figures, accepted for publication in Europhysics Letters
Scientific paper
10.1209/0295-5075/78/69901
We present a new theoretical analysis of the strongly suppressed F- and M-dependent Stark shifts of the Cs ground state hyperfine structure. Our treatment uses third order perturbation theory including off-diagonal hyperfine interactions not considered in earlier treatments. A numerical evaluation of the perturbation sum using bound states up to n=200 yields ground state tensor polarizabilities which are in good agreement with experimental values, thereby bridging the 40-year-old gap between experiments and theory. We have further found that the tensor polarizabilities of the two ground state hyperfine manifolds have opposite signs, in disagreement with an earlier derivation. This sign error has a direct implication for the precise evaluation of the blackbody radiation shift in primary frequency standards.
Hofer Alexander
Moroshkin P.
Ulzega S.
Weis Andrew
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