A Neutral Atom Frequency Reference in the Deep Ultraviolet with FractionalUncertainty = 5.7×10-15
Résumé
We present an assessment of the (6s<SUP>2</SUP>) S01(6s6p)P03 clock transition frequency in Hg199 with an uncertainty reduction of nearly 3 orders of magnitude and demonstrate an atomic quality factor Q of 10<SUP>14</SUP>. The Hg199 atoms are confined in a vertical lattice trap with light at the newly determined magic wavelength of 362.5697±0.0011nm and at a lattice depth of 20E<SUB>R</SUB>. The atoms are loaded from a single-stage magneto-optical trap with cooling light at 253.7 nm. The high Q factor is obtained with an 80 ms Rabi pulse at 265.6 nm. We find the frequency of the clock transition to be 1128575290808162.0±6.4(syst)±0.3(stat)Hz (i.e., with fractionaluncertainty=5.7×10<SUP>-15</SUP>). Neither an atom number nor second order Zeeman dependence has yet been detected. Only three laser wavelengths are used for the cooling, lattice trapping, probing, and detection.
Domaines
Astrophysique [astro-ph]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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