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Creators/Authors contains: "Ni, Kang-Kuen"

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  1. ; ; ; ; ; ; (, Nature)
    Free, publicly-accessible full text available January 23, 2026
  2. ; ; ; ; ; ; (, Science)
    Chemical reactions, in which bonds break and form, are highly dynamic quantum processes. A fundamental question is whether coherence can be preserved in chemical reactions and then harnessed to generate entangled products. Here we investigated this question by studying the 2KRb → K 2 + Rb2reaction at 500 nanokelvins, focusing on the nuclear spin degrees of freedom. We prepared the initial nuclear spins in KRb (potassium-rubidium) in an entangled state by lowering the magnetic field to where the spin-spin interaction dominates and characterized the preserved coherence in nuclear spin wave function after the reaction. We observed an interference pattern that is consistent with full coherence at the end of the reaction, suggesting that entanglement prepared within the reactants could be redistributed through the atom-exchange process. 
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  3. ; ; ; (, Faraday Discussions)
    We explore utilizing our previously observed reactive nuclear spin coherence to control the KRb + KRb ultracold chemical reaction to realize a reaction interferometer. 
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  4. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Research)
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  5. ; ; ; ; ; ; ; ; ; ; et al (, Faraday Discussions)
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  6. ; ; ; ; ; ; (, Quantum Science and Technology)
    Abstract Fully internal and motional state controlled and individually manipulable polar molecules are desirable for many quantum science applications leveraging the rich state space and intrinsic interactions of molecules. While prior efforts at assembling molecules from their constituent atoms individually trapped in optical tweezers achieved such a goal for exactly one molecule (Zhang J T et al 2020 Phys. Rev. Lett. 124 253401; Cairncross W B et al 2021 Phys. Rev. Lett. 126 123402; He X et al 2020 Science 370 331–5), here we extend the technique to an array of five molecules, unlocking the ability to study molecular interactions. We detail the technical challenges and solutions inherent in scaling this system up. With parallel preparation and control of multiple molecules in hand, this platform now serves as a starting point to harness the vast resources and long-range dipolar interactions of molecules. 
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  7. ; ; ; ; ; ; ; ; ; ; et al (, Faraday Discussions)
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  8. ; ; ; ; ; ; ; (, Physical Review Letters)
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  9. ; ; ; ; ; ; (, Nature Chemistry)
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  10. ; ; ; ; ; (, Physical Review Letters)
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