Journal article

Measurement of the scalar third-order electric polarizability of the Cs ground state using coherent-population-trapping spectroscopy in Ramsey geometry

  • Robyr, Jean-Luc Fribourg Atomic Physics Group, Department of Physics, University of Fribourg, Switzerland - SYRTE-Observatoire de Paris, France
  • Knowles, Paul E. Fribourg Atomic Physics Group, Department of Physics, University of Fribourg, Switzerland - Rilkeplatz 8/9, A-1040 Vienna, Austria.
  • Weis, Antoine Fribourg Atomic Physics Group, Department of Physics, University of Fribourg, Switzerland
    07.07.2014
Published in:
  • Physical Review A. - 2014, vol. 90, no. 1, p. 012505
English The ac-Stark shift induced by blackbody radiation is a major source of systematic uncertainty in present-day cesium microwave frequency standards. The shift is parametrized in terms of a third-order electric polarizability α(3)0 that can be inferred from the static electric-field displacement of the clock transition resonance. In this paper, we report on an all-optical coherent-population-trapping pump-probe experiment measuring the differential polarizability Δα(3)0=α(3)0(F=4)−α(3)0(F=3) on a thermal Cs atomic beam, from which we infer α(3)0(F=4)=2.023(6)stat(9)systHz/(kV/cm)2, which corresponds to a scalar Stark shift parameter ks=−2.312(7)stat(10)systHz/(kV/cm)2. The result agrees within two standard deviations with a recent measurement in an atomic fountain, and rules out another recent result obtained in a Cs vapor cell.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303752
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