Quantum defect theory description of weakly bound levels and Feshbach resonances in LiRb

Pérez-Ríos, Jesús ; Dutta, Sourav ; Chen, Yong P ; Greene, Chris H (2015) Quantum defect theory description of weakly bound levels and Feshbach resonances in LiRb New Journal of Physics, 17 (4). 045021. ISSN 1367-2630

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Official URL: http://doi.org/10.1088/1367-2630/17/4/045021

Related URL: http://dx.doi.org/10.1088/1367-2630/17/4/045021

Abstract

The multichannel quantum defect theory (MQDT) in combination with the frame transformation (FT) approach is applied to model the Fano-Feshbach resonances measured for 7Li87Rb and 6Li87Rb [Marzok {\it et al.} Phys. Rev. A {\bf 79} 012717 (2009)]. The MQDT results show a level of accuracy comparable to that of previous models based on direct, fully numerical solutions of the the coupled channel Schrödinger equations (CC). Here, energy levels deduced from 2-photon photoassociation spectra for 7Li85Rb are assigned by applying the MQDT approach, obtaining the bound state energies for the coupled channel problem. Our results confirm that MQDT yields a compact description of photoassociation observables as well as the Fano-Feshbach resonance positions and widths.

Item Type:Article
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ID Code:121078
Deposited On:09 Jul 2021 05:52
Last Modified:09 Jul 2021 05:52

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