Magnetic Feshbach resonances in collisions of ${}^{23}$Na${}^{40}$K with ${}^{40}$K

Abstract

We present measurements of more than 80 magnetic Feshbach resonances in collisions of ultracold ${}^{23}$Na${}^{40}$K with ${}^{40}$K. We assign quantum numbers to a group of low-field resonances and show that they are due to long-range states of the triatomic complex in which the quantum numbers of the separated atom and molecule are approximately preserved. The resonant states are not members of chaotic bath of short-range states. Similar resonances are expected to be a common feature of alkali-metal diatom + atom systems.

arXiv comment10 pages, 3 figures

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• Control of reactive collisions by quantum interference
• Ultracold Sticky Collisions: Theoretical and Experimental Status
• A Feshbach resonance in collisions between ultracold ground state molecules
• Evidence for association of triatomic molecule in ultracold ${}^{23}$Na${}^{40}$K and ${}^{40}$K mixture
• Quantum spin state selectivity and magnetic tuning of ultracold chemical reactions of triplet alkali-metal dimers with alkali-metal atoms
• Complexes formed in collisions between ultracold alkali-metal diatomic molecules and atoms
• Resonant control of elastic collisions between ${}^{23}$Na${}^{40}$K molecules and ${}^{40}$K atoms
• Spectrum of Feshbach resonances in NaLi $+$ Na collisions
• Hyperfine-to-rotational energy transfer in ultracold atom-molecule collisions
• Observation of photoassociation resonances in ultracold atom-molecule collisions
• Preparation of a quantum degenerate mixture of ${}^{23}$Na${}^{40}$K molecules and ${}^{40}$K atoms
• Ab initio calculation of the spectrum of Feshbach resonances in NaLi + Na collisions
• Hyperfine dependent atom-molecule loss analyzed by the analytic solution of few-body loss equations
• Quantum control of ion-atom collisions beyond the ultracold regime
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• Total angular momentum representation for state-to-state quantum scattering of cold molecules in a magnetic field
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• Formation of ultracold triatomic molecules by electric microwave association
• Stabilization of three-body resonances to bound states in a continuum