Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Prospects for Constraints on Nanometer-Range Non-Newtonian Gravity with a State-of-the-art Molecular Clock

Jul 20, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Precision measurement and tests of fundamental physics Poster session


Ultracold molecules are a powerful platform for metrology, precision measurements and searches for new, beyond-the-Standard-Model physics. In particular, Sr$_2$, thanks to its simple structure, insensitivity to external fields and narrow optical transitions, provides an excellent testbed for the search for new interactions. Here, we present a detailed characterisation of our $^{88}$Sr$_2$ molecular clock for a vibrational transition spanning the entire depth of the ground state potential. We control systematic shifts at the $10^{-14}$ level and perform absolute frequency measurements at the $10^{-13}$ level, limited by GPS-based time transfer infrastructure. We discuss prospects to use strontium isotopologues to place improved constraints on new mass-dependent forces, including possible pathways toward the production of ultracold $^{86}$Sr$_2$ and $^{84}$Sr$_2$ dimers and spectroscopy of clock lines in these species.

Presenter name Emily Tiberi
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Primary authors

Kon H. Leung (Columbia University) Brandon Iritani (Columbia University) Emily Tiberi (Columbia University) Dr Mateusz Borkowski (Columbia University and University of Amsterdam) Prof. Tanya Zelevinsky (Columbia University)

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