Near-complete chiral selection in rotational quantum states

JuHyeon Lee, Elahe Abdiha, Boris G. Sartakov, Gerard Meijer and Sandra Eibenberger-Arias ()
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JuHyeon Lee: Fritz-Haber-Institut der Max-Planck-Gesellschaft
Elahe Abdiha: Fritz-Haber-Institut der Max-Planck-Gesellschaft
Boris G. Sartakov: Fritz-Haber-Institut der Max-Planck-Gesellschaft
Gerard Meijer: Fritz-Haber-Institut der Max-Planck-Gesellschaft
Sandra Eibenberger-Arias: Fritz-Haber-Institut der Max-Planck-Gesellschaft

Nature Communications, 2024, vol. 15, issue 1, 1-6

Abstract: Abstract Controlling the internal quantum states of chiral molecules for a selected enantiomer has a wide range of fundamental applications from collision and reaction studies, quantum information to precision spectroscopy. Achieving full enantiomer-specific state transfer is a key requirement for such applications. Using tailored microwave fields, a chosen rotational state can be enriched for a selected enantiomer, even starting from a racemic mixture. This enables rapid switching between samples of different enantiomers in a given state, holding great promise, for instance, for measuring parity violation in chiral molecules. Although perfect state-specific enantiomeric enrichment is theoretically feasible, achieving the required experimental conditions seemed unrealistic. Here, we realize near-ideal conditions, overcoming both the limitations of thermal population and spatial degeneracy in rotational states. We achieve over 92% enantiomer-specific state transfer efficiency using enantiopure samples. This indicates that 96% state-specific enantiomeric purity can be obtained from a racemic mixture, in an approach that is universally applicable to all chiral molecules of C1 symmetry. Our work integrates the control over internal quantum states with molecular chirality, thus expanding the field of state-selective molecular beams studies to include chiral research.

Date: 2024
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DOI: 10.1038/s41467-024-51360-3

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