Excitation-assisted nonadiabatic charge-transfer reaction in a mixed atom-ion system

Ming Li, Michael Mills, Prateek Puri, Alexander Petrov, Eric R. Hudson, and Svetlana Kotochigova
Phys. Rev. A 99, 062706 – Published 14 June 2019

Abstract

An important physical process unique to neutral-ion systems is the charge-transfer reaction. Here, we present measurements of and models for charge-transfer processes between cotrapped ultracold Ca atoms and Yb ions under well-controlled conditions. The theoretical analysis suggests the existence of three reaction mechanisms when lasers from a magneto-optical trap and an additional catalyst laser are present. We show that the near-degeneracy of the excited Ca(P11)+Yb+(S2) and Ca+(S2)+Yb(D23) asymptotic limits leads to large charge-transfer rate coefficients that can be controlled by changing the frequency of the catalyst laser and the ion temperature. Our model agrees with experimental rate-coefficient measurements between 50 mK and 1 K, with and without the catalyst laser, using just a single free parameter.

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  • Received 8 January 2019

DOI:https://doi.org/10.1103/PhysRevA.99.062706

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ming Li1,*, Michael Mills2, Prateek Puri2, Alexander Petrov1,3, Eric R. Hudson2,4, and Svetlana Kotochigova1

  • 1Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
  • 2Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
  • 3NRC Kurchatov Institute PNPI, Gatchina, Leningrad District 188300, and Division of Quantum Mechanics, St. Petersburg State University, St. Petersburg 199034, Russia
  • 4Center for Quantum Science and Engineering, University of California, Los Angeles, California 90095, USA

  • *ming.li@temple.edu

See Also

Engineering Excited-State Interactions at Ultracold Temperatures

Michael Mills, Prateek Puri, Ming Li, Steven J. Schowalter, Alexander Dunning, Christian Schneider, Svetlana Kotochigova, and Eric R. Hudson
Phys. Rev. Lett. 122, 233401 (2019)

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Vol. 99, Iss. 6 — June 2019

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