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Atom gravimeters and gravitational redshift

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  • Peter Wolf

    (* Systèmes de Références Temps Espace, CNRS UMR 8630, Laboratoire National de Métrologie et d’Essais, Université Pierre et Marie Curie, Observatoire de Paris, 61 avenue de l’Observatoire, 75014 Paris, France peter.wolf@obspm.fr)

  • Luc Blanchet

    († GRECO, Institut d’Astrophysique de Paris, CNRS UMR 7095, UPMC, 98 bis boulevard Arago, 75014 Paris, France)

  • Christian J. Bordé

    (* Systèmes de Références Temps Espace, CNRS UMR 8630, Laboratoire National de Métrologie et d’Essais, Université Pierre et Marie Curie, Observatoire de Paris, 61 avenue de l’Observatoire, 75014 Paris, France peter.wolf@obspm.fr)

  • Serge Reynaud

    (‡ Laboratoire Kastler Brossel, CNRS UMR 8552, Ecole Normale Supérieure, UPMC, Campus Jussieu, 75252 Paris, France)

  • Christophe Salomon

    (§ Laboratoire Kastler Brossel and Collège de France, CNRS UMR 8552, ENS, UPMC, 24 rue Lhomond, 75231 Paris, France)

  • Claude Cohen-Tannoudji

    (§ Laboratoire Kastler Brossel and Collège de France, CNRS UMR 8552, ENS, UPMC, 24 rue Lhomond, 75231 Paris, France)

Abstract

Arising from: H. Müller, A. Peters & S. Chu Nature 463, 926–929 (2010)10.1038/nature08776 ; Müller & Chu reply In ref. 1 the authors present a re-interpretation of atom interferometry experiments published a decade ago2. They now consider the atom interferometry experiments2 as a measurement of the gravitational redshift on the quantum clock operating at the Compton frequency ωC = mc2/ ≈ 2π × 3.0 × 1025 Hz, where m is the caesium (Cs) atom rest mass. They then argue that this redshift measurement compares favourably with existing3 as well as projected4 clock tests. Here we show that this interpretation is incorrect.

Suggested Citation

  • Peter Wolf & Luc Blanchet & Christian J. Bordé & Serge Reynaud & Christophe Salomon & Claude Cohen-Tannoudji, 2010. "Atom gravimeters and gravitational redshift," Nature, Nature, vol. 467(7311), pages 1-1, September.
    • Handle: RePEc:nat:nature:v:467:y:2010:i:7311:d:10.1038_nature09340
    DOI: 10.1038/nature09340
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