Analyzing Feshbach resonances: A Li6-Cs133 case study
Abstract
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 6Li-133Csare presented and compared to previously measured 6Li-133CsFeshbach resonances (FRs) [Repp et al., Phys. Rev. A 87, 010701(R) (2013), 10.1103/PhysRevA.87.010701]. 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 <1G 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.
- Publication:
-
Physical Review A
- Pub Date:
- July 2014
- DOI:
- 10.1103/PhysRevA.90.012710
- arXiv:
- arXiv:1406.0477
- Bibcode:
- 2014PhRvA..90a2710P
- Keywords:
-
- 34.50.-s;
- 67.85.-d;
- 34.10.+x;
- 34.20.Cf;
- Scattering of atoms and molecules;
- Ultracold gases trapped gases;
- General theories and models of atomic and molecular collisions and interactions;
- Interatomic potentials and forces;
- Condensed Matter - Quantum Gases;
- Physics - Atomic Physics;
- Quantum Physics
- E-Print:
- 16 pages, 3 figures, 1 table