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The geometric phase controls ultracold chemistry

The geometric phase is shown to control the outcome of an ultracold chemical reaction. The control is a direct consequence of the sign change on the interference term between two scattering pathways (direct and looping), which contribute to the reactive collision process in the presence of a conical...

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Autores principales: Kendrick, B. K., Hazra, Jisha, Balakrishnan, N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4532881/
https://www.ncbi.nlm.nih.gov/pubmed/26224326
http://dx.doi.org/10.1038/ncomms8918
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author Kendrick, B. K.
Hazra, Jisha
Balakrishnan, N.
author_facet Kendrick, B. K.
Hazra, Jisha
Balakrishnan, N.
author_sort Kendrick, B. K.
collection PubMed
description The geometric phase is shown to control the outcome of an ultracold chemical reaction. The control is a direct consequence of the sign change on the interference term between two scattering pathways (direct and looping), which contribute to the reactive collision process in the presence of a conical intersection (point of degeneracy between two Born–Oppenheimer electronic potential energy surfaces). The unique properties of the ultracold energy regime lead to an effective quantization of the scattering phase shift enabling maximum constructive or destructive interference between the two pathways. By taking the O+OH→H+O(2) reaction as an illustrative example, it is shown that inclusion of the geometric phase modifies ultracold reaction rates by nearly two orders of magnitude. Interesting experimental control possibilities include the application of external electric and magnetic fields that might be used to exploit the geometric phase effect reported here and experimentally switch on or off the reactivity.
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spelling pubmed-45328812015-08-31 The geometric phase controls ultracold chemistry Kendrick, B. K. Hazra, Jisha Balakrishnan, N. Nat Commun Article The geometric phase is shown to control the outcome of an ultracold chemical reaction. The control is a direct consequence of the sign change on the interference term between two scattering pathways (direct and looping), which contribute to the reactive collision process in the presence of a conical intersection (point of degeneracy between two Born–Oppenheimer electronic potential energy surfaces). The unique properties of the ultracold energy regime lead to an effective quantization of the scattering phase shift enabling maximum constructive or destructive interference between the two pathways. By taking the O+OH→H+O(2) reaction as an illustrative example, it is shown that inclusion of the geometric phase modifies ultracold reaction rates by nearly two orders of magnitude. Interesting experimental control possibilities include the application of external electric and magnetic fields that might be used to exploit the geometric phase effect reported here and experimentally switch on or off the reactivity. Nature Pub. Group 2015-07-30 /pmc/articles/PMC4532881/ /pubmed/26224326 http://dx.doi.org/10.1038/ncomms8918 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kendrick, B. K.
Hazra, Jisha
Balakrishnan, N.
The geometric phase controls ultracold chemistry
title The geometric phase controls ultracold chemistry
title_full The geometric phase controls ultracold chemistry
title_fullStr The geometric phase controls ultracold chemistry
title_full_unstemmed The geometric phase controls ultracold chemistry
title_short The geometric phase controls ultracold chemistry
title_sort geometric phase controls ultracold chemistry
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4532881/
https://www.ncbi.nlm.nih.gov/pubmed/26224326
http://dx.doi.org/10.1038/ncomms8918
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