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Faraday-Shielded dc Stark-Shift-Free Optical Lattice Clock.
Beloy, K; Zhang, X; McGrew, W F; Hinkley, N; Yoon, T H; Nicolodi, D; Fasano, R J; Schäffer, S A; Brown, R C; Ludlow, A D.
Afiliación
  • Beloy K; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Zhang X; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • McGrew WF; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Hinkley N; Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
  • Yoon TH; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Nicolodi D; Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
  • Fasano RJ; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Schäffer SA; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Brown RC; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • Ludlow AD; Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
Phys Rev Lett ; 120(18): 183201, 2018 May 04.
Article en En | MEDLINE | ID: mdl-29775346
We demonstrate the absence of a dc Stark shift in an ytterbium optical lattice clock. Stray electric fields are suppressed through the introduction of an in-vacuum Faraday shield. Still, the effectiveness of the shielding must be experimentally assessed. Such diagnostics are accomplished by applying high voltage to six electrodes, which are grounded in normal operation to form part of the Faraday shield. Our measurements place a constraint on the dc Stark shift at the 10^{-20} level, in units of the clock frequency. Moreover, we discuss a potential source of error in strategies to precisely measure or cancel nonzero dc Stark shifts, attributed to field gradients coupled with the finite spatial extent of the lattice-trapped atoms. With this consideration, we find that Faraday shielding, complemented with experimental validation, provides both a practically appealing and effective solution to the problem of dc Stark shifts in optical lattice clocks.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos