Field-linked resonances of polar molecules
ORAL
Abstract
We observed a novel type of scattering resonances related to "field-linked" bound states between two polar molecules. We use a microwave field addressing the J = 0 to J = 1 rotational transitions of the ground state NaK molecules to induce a long-range potential between the molecules. The interaction potential can be described by a van der Waals interaction plus a dipole-dipole interaction. The former shields the molecules against destructive short-range collisions, and together with the latter, hosts the "field-linked" bound states. We measured the resonance feature related to these bound states in both inelastic and elastic scattering, and observed orders of magnitude tunability over the collision rates. The field-linked resonance demonstrated here is universal and could be applied to a wide range of polar molecules, providing a general method to control the intermolecular interactions as well as to assemble ultracold polyatomic molecules.
*We gratefully acknowledge support from the Max Planck Society, the European Union (PASQuanS Grant No. 817482) and the Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy -- EXC-2111 -- 390814868 and under Grant No. FOR 2247. A.S. and T.H. acknowledge funding from the Max Planck Harvard Research Center for Quantum Optics.
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Publication: [1] Chen, X.-Y. et al, Field-linked resonances of polar molecules. Preprint at https://arxiv.org/abs/2210.13324 (2022).
[2] Deng, F. et al, Effective potential and superfluidity of microwave-dressed polar molecules. Prepreint at https://arxiv.org/abs/2210.13253 (2022).
Presenters
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Xing-Yan Chen
- Max Planck Institute of Quantum Optics