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• W3193900512 abstract "We study enhanced magneto-association of atoms into weakly-bound molecules near a Feshbach resonance using a quench preparatory stage. In anticipation of experiments with NASA's Cold Atom Laboratory aboard the International Space Station, we assume as a baseline a dual-species ($^{87}$Rb and $^{41}$K) gas in a parameter regime enabled by a microgravity environment. This includes subnanokelvin temperatures and dual-species gases at densities as low as 10$^8$/cm$^3$. Our studies indicate that, in such a regime, traditional magneto-association schemes are inefficient due to the weak coupling between atomic and molecular states at low-densities, thus requiring extremely long magnetic field sweeps. To address this issue we propose a modified scheme where atoms are quenched to unitarity before proceeding with magneto-association. This substantially improves molecular formation, allowing for up to $80%$ efficiency, and within time-scales much shorter than those associated to atomic and molecular losses. We show that this scheme also applies at higher densities, therefore proving to be of interest to ground-based experiments as well." @default.
• W3193900512 created "2021-08-30" @default.
• W3193900512 creator A5004453716 @default.
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• W3193900512 date "2021-09-08" @default.
• W3193900512 modified "2023-09-30" @default.
• W3193900512 title "Quenched magneto-association of ultracold Feshbach molecules" @default.
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• W3193900512 doi "https://doi.org/10.1103/physreva.104.033310" @default.
• W3193900512 hasPublicationYear "2021" @default.
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