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9th Symposium on Frequency Standards and Metrology

16–20 Oct 2023
Kingscliff, NSW, Australia
Australia/Sydney timezone

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Session

Precision Measurements and Fundamental Physics II

17 Oct 2023, 14:00
Kingscliff, NSW, Australia

Kingscliff, NSW, Australia

Mantra on Salt Beach Kingscliff, Tweed Coast Gunnamatta Avenue, Kingscliff NSW

Conveners

Precision Measurements and Fundamental Physics II

  • Franklyn Quinlan (National Institute of Standards and Technology)

Presentation materials

There are no materials yet.

  1. 129. Fast oscillating fundamental “constants”
    DMITRY BUDKER (Helmholtz Institute Mainz and UC Berkeley)
    17/10/2023, 14:00
    Precision Tests on Fundamental Physics
    Invited Oral

    Background ultralight scalar fields that are considered as a viable candidate for galactic dark matter may manifest themselves in apparent variation of fundamental constants, see, for example, [1,2].

    In this talk, we will discuss some of the recent work of our group and collaborators, for example [3- 6], where we search for oscillating dark matter with Compton frequencies from near DC up to...

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  2. 115. High-Accuracy Yb+-Ion Clocks for Test of Fundamental Principles and Robust Long-Term Operation
    Nils Huntemann (Physikalisch-Technische Bundesanstalt (PTB))
    17/10/2023, 14:30
    Precision Tests on Fundamental Physics
    Invited Oral

    We report on results from long-term operation of the Yb1 ion optical clock of PTB, where we have obtained uptimes exceeding 80% over typical TAI reporting intervals of 30 days. Using these data and the special electronic structure of Yb+ allows us to improve searches for a coupling of ultra-light dark matter (UDM) to photons, temporal drifts of the fine structure constant and its potential...

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  3. 51. Laser-Cooling Cadmium with only Triplet Excitations and Cadmium Isotope Shift Measurements
    Kurt Gibble (The Pennsylvania State University)
    17/10/2023, 15:00
    Precision Tests on Fundamental Physics
    Invited Oral

    Cadmium is attractive for optical lattice clocks and for searches for Dark Matter and beyond-Standard-Model physics via isotope shift measurements. The cadmium clock transition has a small sensitivity to blackbody radiation and it has 8 stable isotopes, 6 spin 0 bosonic isotopes, and 2 spin ½ fermionic isotopes. Without using 229 nm light to drive the singlet transition, we capture thermal Cd...

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  4. 179. Atomic frequency standards, physical constants and metrology
    Jacques Vanier (Universite de Montreal Canada)
    17/10/2023, 15:30
    Invited Oral

    The paper highlights the importance of the time unit definition,by means of the atomic Cs frequency standard, in the definition of the base units of the International System of units (SI).

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