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Atoms 2019, 7(1), 36; https://doi.org/10.3390/atoms7010036

Universal Scattering of Ultracold Atoms and Molecules in Optical Potentials

1
Department of Physics, Temple University, Philadelphia, PA 19122, USA
2
Joint Quantum Institute, National Institute of Standards and Technology, and University of Maryland, Gaithersburg, MD 20899, USA
3
Department of Physics, Saint Petersburg State University, Ulyanovskaya 3, Saint Petersburg 198504, Russia
*
Author to whom correspondence should be addressed.
Received: 29 January 2019 / Revised: 25 February 2019 / Accepted: 12 March 2019 / Published: 15 March 2019
(This article belongs to the Special Issue Few-body Physics in Ultracold Quantum Gases)
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Abstract

Universal collisions describe the reaction of molecules and atoms as dominated by long-range interparticle interactions. Here, we calculate the universal inelastic rate coefficients for a large group of ultracold polar molecules in their lower ro-vibrational states colliding with one of their constituent atoms. The rate coefficients are solely determined by values of the dispersion coefficient and reduced mass of the collisional system. We use the ab initio coupled-cluster linear response method to compute dynamic molecular polarizabilities and obtain the dispersion coefficients for some of the collisional partners and use values from the literature for others. Our polarizability calculations agree well with available experimental measurements. Comparison of our inelastic rate coefficients with results of numerically exact quantum-mechanical calculations leads us to conjecture that collisions with heavier atoms can be expected to be more universal. View Full-Text
Keywords: ultracold atom-molecule collisions; chemical reactions; universal model; dispersion interaction; van der Waals coefficients; dynamic polorizability ultracold atom-molecule collisions; chemical reactions; universal model; dispersion interaction; van der Waals coefficients; dynamic polorizability
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Li, H.; Li, M.; Makrides, C.; Petrov, A.; Kotochigova, S. Universal Scattering of Ultracold Atoms and Molecules in Optical Potentials. Atoms 2019, 7, 36.

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