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

Towards Microwave Shielding of Ultracold SrF Molecules

Jul 19, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session


Quantum degenerate gases of ultracold dipolar molecules present a promising platform for advances in quantum simulation, quantum chemistry, and searches for physics beyond the Standard Model. Direct laser cooling of dipolar molecules is one successful method for achieving ultracold temperatures. Currently, we use sub-Doppler $\Lambda$-enhanced gray molasses cooling to load SrF molecules into an optical dipole trap. We have trapped $\sim 160$ SrF molecules at temperatures as low as 15 $\mu$K in a 420 $\mu$K deep trap using this approach. However, any significant increase in the phase space density of our molecular gas will likely be limited by inelastic losses caused e.g. by the barrierless chemical reaction SrF + SrF $\rightarrow$ SrF$_2$ + Sr. Here we report our plans to surmount this challenge by using circularly polarized microwaves to create a repulsive interaction between the SrF molecules. We generate these microwaves by combining two orthogonal polarizations with controllable phase and amplitude offsets onto an orthomode transducer, and then deliver them to the molecules via a conical horn and ellipsoidal mirror. Successful implementation of this scheme should clear a path to achieving a quantum degenerate gas of SrF molecules.

Presenter name Geoffrey Zheng
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Primary authors

Geoffrey Zheng (University of Chicago) Dr Thomas Langin (University of Chicago) Varun Jorapur (University of Chicago) Mr Qian Wang (University of Chicago) David DeMille (University of Chicago & Argonne National Laboratory)

Presentation materials

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