Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2015-04-23

Journal: PHYSICAL REVIEW A

Included Journals: Scopus、EI、SCIE

Volume: 91

Issue: 4

ISSN: 1050-2947

Abstract: We present a simple theoretical model for describing ultracold-atomic collision dynamics and Feshbach resonances (FRs) without onerous numerical computation. An effective quantum-defect phase shift delta(eff)(Y) is derived and the reference potentials are shown acting as an assistant tool in the calculation. With the help of singlet and triplet scattering lengths a(S) and a(T), as well as an adjustable parameter gamma(sr), this model can be used to reliably predict FRs. An application example of Li-6-K-40 collision shows that the results given by the simple model agree quite well with both the relevant experimental data and the coupled-channel calculations.