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Reaction interferometry with ultracold molecules.

Jeshurun Luke1,2,3, Lingbang Zhu1,2,3, Yi-Xiang Liu1,2,3

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We demonstrate coherent control of ultracold molecule reactions using quantum interference. This "reaction interferometer" manipulates product states and reveals atomic entanglement in potassium-rubidium (KRb) reactions.

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Area of Science:

  • Quantum Chemistry
  • Molecular Dynamics
  • Atomic Physics

Background:

  • Ultracold reactions offer precise control over chemical processes.
  • Nuclear spin coherence in molecules is a key quantum property.
  • Previous work demonstrated coherence in KRb molecular reactions.

Purpose of the Study:

  • To propose and explore a novel method for coherent control of chemical reactions.
  • To utilize quantum interference for manipulating reaction product states.
  • To investigate atomic entanglement within reactant molecules.

Main Methods:

  • Concept of a
  • reaction interferometer
  • splitting and recombining molecular clouds.
  • Imprinting a controlled phase shift between molecular paths.
  • Measuring the final product state distribution.

Main Results:

  • Quantum interference patterns allow for coherent control of KRb reaction product states.
  • Specific product channels act as witnesses for atomic entanglement.
  • Demonstrated feasibility of controlling reaction dynamics via quantum phenomena.

Conclusions:

  • Quantum interference provides a powerful tool for controlling molecular reaction outcomes.
  • The reaction interferometer concept opens new avenues in quantum chemistry.
  • Entanglement witnessing in reaction products confirms quantum correlations.