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Frequency Metrology with Ultracold Molecules

December 5, 2022 - 11:00am
Tanya Zelevinsky
Columbia University

Abstract: Ultracold atom technologies have transformed our ability to perform high-precision spectroscopy and apply it to time and frequency metrology.  Many of the highest-performing atomic clocks are based on laser-cooled atoms trapped in optical lattices.  These clocks can be applied to fundamental questions, for example to improve our understanding of gravity and general relativity.  In this talk, I will discuss using lattice-trapped ultracold diatomic molecules, rather than atoms, as a reference for clocks.  Molecules have more internal quantum states and therefore are relatively challenging to control.  On the other hand, they offer a large number of prospective clock transitions, and can help us probe alternative aspects of new physical interactions.  I will discuss the current precision limit of molecular metrology, and possible paths forward.

Location: ATL 2400

JQI Seminars are held on Mondays during Fall and Spring semesters at 11:00 a.m. Eastern Time in Room 2400 of the Atlantic Building. University of Maryland affiliates may participate using Zoom. The seminars are also livestreamed on the JQI YouTube channel (, which supports audience participation in the chat interface.