Analyzing Feshbach resonances: A Li-6-Cs-133 case study

作者：Pires R^*; Repp M; Ulmanis J; Kuhnle E D; Weidemueller M; Tiecke T G; Greene Chris H; Ruzic Brandon P; Bohn John L; Tiemann E

来源：Physical Review A, 2014, 90(1): 012710.

DOI：10.1103/PhysRevA.90.012710

We provide a comprehensive comparison of a coupled channel calculation, the asymptotic bound-state model (ABM), and the multichannel quantum defect theory (MQDT). Quantitative results for Li-6 -Cs-133 are presented and compared to previously measured Li-6 -Cs-133 Feshbach resonances (FRs) [Repp et al., Phys. Rev. A 87, 010701(R) (2013)]. We demonstrate how the accuracy of the ABM can be stepwise improved by including magnetic dipole-dipole interactions and coupling to a nondominant virtual state. We present a MQDT calculation, where magnetic dipole-dipole and second-order spin-orbit interactions are included. A frame transformation formalism is introduced, which allows the assignment of measured FRs with only three parameters. All three models achieve a total rms error of <1 G on the observed FRs. We critically compare the different models in view of the accuracy for the description of FRs and the required input parameters for the calculations.

• 出版日期2014-7-30
• 单位MIT