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Observation and absolute frequency measurements of the 1S0-3P0 optical clock transition in neutral ytterbium.
Hoyt, C W; Barber, Z W; Oates, C W; Fortier, T M; Diddams, S A; Hollberg, L.
Afiliação
  • Hoyt CW; National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. hoycha@boulder.nist.gov
Phys Rev Lett ; 95(8): 083003, 2005 Aug 19.
Article em En | MEDLINE | ID: mdl-16196856
ABSTRACT
We report the direct excitation of the highly forbidden (6s2) 1S0 <--> (6s6p) 3P0 optical transition in two odd isotopes of neutral ytterbium. As the excitation laser frequency is scanned, absorption is detected by monitoring the depletion from an atomic cloud at approximately 70 microK in a magneto-optical trap. The measured frequency in 171Yb (F=1/2) is 518,295,836,591.6 +/- 4.4 kHz. The measured frequency in 173Yb (F=5/2) is 518,294,576,847.6 +/- 4.4 kHz. Measurements are made with a femtosecond-laser frequency comb calibrated by the National Institute of Standards and Technology cesium fountain clock and represent nearly a 10(6)-fold reduction in uncertainty. The natural linewidth of these J=0 to J=0 transitions is calculated to be approximately 10 mHz, making them well suited to support a new generation of optical atomic clocks based on confinement in an optical lattice.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Estados Unidos
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Estados Unidos