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

Pathway to magneto-optical trapping of SrOH to probe for Dark Matter and EDMs

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


The complex structure of polyatomic molecules offers powerful features that can be exploited for applications in quantum simulation and precision measurement. One of these features is a plethora of ro-vibrational states. In the linear triatomic molecule SrOH, two vibrational states have a near-degeneracy that can be probed with microwaves (in contrast to typical vibrational splittings of $\sim$10 THz). Because the energies of these states depend differently on the proton-to-electron mass ratio, $\mu$, a microwave resonance between them is highly sensitive to changes in $\mu$ over time. We report on high-resolution vibrational branching ratio measurements of four excited vibronic states. We are now able to design a laser-cooling scheme with over 10,000 photon scatters before loss to an unaddressed vibrational state, more than enough to form a MOT and load an optical trap. Only 8 lasers are required for this scheme, fewer than for any other known polyatomic molecule cooling cycle. We describe progress towards laser cooling of SrOH and a high-sensitivity measurement of $\mu$ variation using ultracold SrOH molecules.

Presenter name Annika Lunstad
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Primary authors

Annika Lunstad (Harvard University) Zack Lasner (Harvard University) Hana Lampson (Harvard University) Prof. John Doyle (Harvard University)

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