Blackbody radiation shift in 87Rb frequency standard

Abstract

The operation of atomic clocks is generally carried out at room temperature, whereas the definition of the second refers to the clock transition in an atom at absolute zero. This implies that the clock transition frequency should be corrected in practice for the effect of finite temperature of which the leading contributor is the blackbody radiation (BBR) shift. Experimental measurements of the BBR shifts are difficult. In this work, we have calculated the blackbody radiation shift of the ground-state hyperfine microwave transition in 87Rb using the relativistic all-order method and carried out detailed evaluation of the accuracy of our final value. Particular care is taken to accurately account for the contributions from highly-excited states. Our predicted value for the Stark coefficient, k_S=-1.240(4)\times 10^{-10}\text{Hz/(V/m)}^{2} is three times more accurate than the previous calculation [1].

7 pages

References in corpus (5)

• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• High-accuracy calculation of black-body radiation shift in ${}^{133}$Cs primary frequency standard
• Frequency shift of cesium clock transition due to blackbody radiation
• Frequency shift of hyperfine transitions due to blackbody radiation
• Demonstration of a Dual Alkali Rb/Cs Atomic Fountain Clock

Cited by in corpus (8)

• Progress in Atomic Fountains at LNE-SYRTE
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• Blackbody radiation shift, multipole polarizabilities, oscillator strengths, lifetimes, hyperfine constants, and excitation energies in Ca+
• Contributing to TAI with a Secondary Representation of the SI Second
• Polarizabilities and tune-out wavelengths of the hyperfine ground states of ${}^{87,85}$Rb
• Resolving all-order method convergence problems for atomic physics applications
• Hyperfine structure of ${}^{173}{\mathrm{Yb}}^{+}$: toward resolving the ${}^{173}\mathrm{Yb}$ nuclear octupole moment puzzle
• Measurement of the spin-dipolar part of the tensor polarizability of ${}^{87}$Rb