An optical lattice clock with spin-polarized 87Sr atoms

X. Baillard; M. Fouché; R. Le Targat; P. G. Westergaard; A. Lecallier; F. Chapelet; M. Abgrall; G. D. Rovera; P. Laurent; P. Rosenbusch; S. Bize; G. Santarelli; A. Clairon; P. Lemonde; G. Grosche; B. Lipphardt; H. Schnatz

doi:10.1140/epjd/e2007-00330-3

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Atomic, Molecular, Optical and Plasma Physics

Eur. Phys. J. D 48, 11-17 (2008)
https://doi.org/10.1140/epjd/e2007-00330-3

An optical lattice clock with spin-polarized ⁸⁷Sr atoms

X. Baillard¹^a, M. Fouché¹^,2, R. Le Targat¹, P. G. Westergaard¹, A. Lecallier¹, F. Chapelet¹, M. Abgrall¹, G. D. Rovera¹, P. Laurent¹, P. Rosenbusch¹, S. Bize¹, G. Santarelli¹, A. Clairon¹, P. Lemonde¹, G. Grosche³, B. Lipphardt³ and H. Schnatz³

¹ LNE-SYRTE, Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France
² Laboratoire Collisions Agrégats Réactivité, UMR 5589 CNRS, Université Paul Sabatier Toulouse 3, IRSAMC, 31062 Toulouse Cedex 9, France
³ Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Corresponding author: ^a xavier.baillard@obspm.fr

Received: 2 October 2007
Revised: 15 November 2007
Published online: 7 December 2007

Abstract

We present a new evaluation of an ⁸⁷Sr optical lattice clock using spin polarized atoms. The frequency of the ¹S₀→³P₀ clock transition is found to be 429 228 004 229 873.6 Hz with a fractional uncertainty of 2.6×10^-15, a value that is comparable to the frequency difference between the various primary standards throughout the world. This measurement is in excellent agreement with a previous one of similar accuracy [Phys. Rev. Lett. 98, 083002 (2007)].

PACS: 06.30.Ft – Time and frequency / 37.10.Jk – Atoms in optical lattices / 32.60.+i – Zeeman and Stark effects / 32.30.Jc – Visible and ultraviolet spectra

© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008