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Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths

Hutson, Jeremy M.

Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths Thumbnail


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Abstract

In the absence of inelastic scattering, Feshbach resonances produce poles in scattering lengths and very large peaks in elastic cross-sections. However, inelastic scattering removes the poles. Whenever the resonant state is coupled comparably to the elastic and inelastic channels, the scattering length exhibits only a small oscillation and peaks in cross-sections are significantly suppressed. A resonant scattering length is defined to characterize the amplitude of the oscillation, and is shown to be small for many collisions of ultracold molecules. The results suggest that cross-sections for some ultracold collision processes will be much less sensitive to details of the potential than has been expected.

Citation

Hutson, J. M. (2007). Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths. New Journal of Physics, 9, Article 152. https://doi.org/10.1088/1367-2630/9/5/152

Journal Article Type Article
Online Publication Date May 24, 2007
Publication Date May 24, 2007
Deposit Date Jun 19, 2013
Publicly Available Date May 18, 2017
Journal New Journal of Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 9
Article Number 152
DOI https://doi.org/10.1088/1367-2630/9/5/152

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