Skip to main content

Research Repository

Advanced Search

Time delays in ultracold atomic and molecular collisions

Frye, Matthew D.; Hutson, Jeremy M.

Time delays in ultracold atomic and molecular collisions Thumbnail


Authors



Abstract

We study the behavior of the Eisenbud-Wigner collisional time delay around Feshbach resonances in cold and ultracold atomic and molecular collisions. We carry out coupled-channel scattering calculations on ultracold Rb and Cs collisions. In the low-energy limit, the time delay is proportional to the scattering length and so exhibits a pole as a function of applied field. At high energy, it exhibits a Lorentzian peak as a function of either energy or field. For narrow resonances, the crossover between these two regimes occurs at an energy proportional to the square of the resonance strength parameter sres. For wider resonances, the behavior is more complicated and we present an analysis in terms of multichannel quantum defect theory.

Citation

Frye, M. D., & Hutson, J. M. (2019). Time delays in ultracold atomic and molecular collisions. Physical Review Research, 1(3), Article 033023. https://doi.org/10.1103/physrevresearch.1.033023

Journal Article Type Article
Online Publication Date Oct 15, 2019
Publication Date Oct 31, 2019
Deposit Date Oct 18, 2019
Publicly Available Date Oct 18, 2019
Journal Physical Review Research
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 1
Issue 3
Article Number 033023
DOI https://doi.org/10.1103/physrevresearch.1.033023

Files

Published Journal Article (435 Kb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Published by the American Physical Society under the terms of the
Creative Commons Attribution 4.0 International license. Further
distribution of this work must maintain attribution to the author(s)
and the published article’s title, journal citation, and DOI.




You might also like



Downloadable Citations