Reactions between layer-resolved molecules mediated by dipolar spin exchange

Microscopic control over polar molecules with tunable interactions enables the realization of distinct quantum phenomena. Using an electric field gradient, we demonstrated layer-resolved state preparation and imaging of ultracold potassium-rubidium molecules confined to two-dimensional planes in an...

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Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 375; no. 6586; pp. 1299 - 1303
Main Authors Tobias, William G, Matsuda, Kyle, Li, Jun-Ru, Miller, Calder, Carroll, Annette N, Bilitewski, Thomas, Rey, Ana Maria, Ye, Jun
Format Journal Article
LanguageEnglish
Published United States The American Association for the Advancement of Science 18.03.2022
Subjects
Chemical reactions
Electric fields
Interlayers
Optical lattices
Potassium
Quantum phenomena
Rubidium
Spin exchange
Temperature dependence
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Summary:Microscopic control over polar molecules with tunable interactions enables the realization of distinct quantum phenomena. Using an electric field gradient, we demonstrated layer-resolved state preparation and imaging of ultracold potassium-rubidium molecules confined to two-dimensional planes in an optical lattice. The rotational coherence was maximized by rotating the electric field relative to the light polarization for state-insensitive trapping. Spatially separated molecules in adjacent layers interact through dipolar spin exchange of rotational angular momentum; by adjusting these interactions, we regulated the local chemical reaction rate. The resonance width of the exchange process vastly exceeded the dipolar interaction energy, an effect attributed to thermal energy. This work realized precise control of interacting molecules, enabling electric field microscopy on subwavelength scales and allowing access to unexplored physics in two-dimensional systems.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.abn8525