Journal article

Stark shift of the Cs clock transition frequency: a new experimental approach

  • Robyr, J.-P. Fribourg Group of Atomic Physics (FRAP), Department of Physics, University of Fribourg, Switzerland
  • Knowles, Paul E. Fribourg Group of Atomic Physics (FRAP), Department of Physics, University of Fribourg, Switzerland
  • Weis, Antoine Fribourg Group of Atomic Physics (FRAP), Department of Physics, University of Fribourg, Switzerland
    04.03.2010
Published in:
  • IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. - 2010, vol. 57, no. 3, p. 613 - 617
English The blackbody radiation shift, a manifestation of the Stark effect caused by blackbody radiation, contributes to the systematic uncertainty in Cs-based frequency standards at a level of 1 x 10⁻¹⁵. Few measurements of the third-order scalar electric polarizability of the Cs ground states, mainly responsible for the ac Stark shift in atomic clocks, have given better than 10% accuracy. We report progress in the development of a fully optical Ramsey pump-probe measurement in a thermal atomic beam, based on coherent population trapping (CPT), for the measurement of the third-order scalar and tensor polarizabilities of the Cs ground states. We give details of the apparatus and measurement techniques as well as our first 500 Hz half-period Ramsey fringes
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301464
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