Neutral atom frequency reference in the deep ultraviolet with fractional uncertainty=5.7×10 -15

J. J. McFerran, L. Yi, S. Mejri, S. Di Manno, W. Zhang, J. Guéna, Y. Le Coq, S. Bize

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62 Citations (Scopus)

Abstract

We present an assessment of the (6s2) 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 ∼1014. 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 R. The atoms are loaded from a single-stage magneto-optical trap with cooling light at 253.7nm. The high Q factor is obtained with an 80ms Rabi pulse at 265.6nm. We find the frequency of the clock transition to be 1128575290808162.0±6.4(syst)±0.3(stat)Hz (i.e., with fractional uncertainty=5.7×10 -15). 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.

Original languageEnglish
Article number183004
JournalPhysical Review Letters
Volume108
Issue number18
DOIs
Publication statusPublished - 4 May 2012
Externally publishedYes

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