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Updated: May 8, 2025

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Three-Body Recombination of Ultracold Microwave-Shielded Polar Molecules
Ian Stevenson1, Shayamal Singh2, Ahmed Elkamshishy2
1Columbia University, Department of Physics, New York, New York, USA.
Abstract:
A combined experimental and theoretical study is carried out on the three-body recombination process in a gas of microwave-shielded polar molecules. For ground-state polar molecules dressed with a strong microwave field, field-linked bound states can appear in the intermolecular potential. We model three-body recombination into such bound states using classical trajectory calculations. Our results show that recombination can explain the enhanced loss rates observed at small microwave detunings in trapped samples of bosonic NaCs [Bigagli et al., Nat. Phys. 19, 1579-1584 (2023)NPAHAX1745-247310.1038/s41567-023-02200-6]. Specifically, our calculations reproduce the experimentally measured three-body loss rates across a wide range of microwave Rabi couplings, detunings, and temperatures. This work suggests that for bosonic shielded molecular systems in which the two-body loss is sufficiently suppressed and a field-linked bound state is present, the dominant loss process will be three-body recombination.
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