Avoided crossings between bound states of ultracold Cesium dimers
Jeremy M. Hutson, Eite Tiesinga, Paul S. Julienne
We present a new computational method for calculating bound states of ultracold alkali metal dimers in the presence of magnetic fields. The new method is based on propagation of coupled differential equations and does not use a basis set for the interatomic distance coordinate. It is much more efficient than the previous method based on a radial basis set. We carry out converged calculations on Cs$_2$ and compare the results with experimental results. Small but significant discrepancies are observed, especially for levels with $l$ symmetry ($L=8$). The discrepancies should allow the development of improved potential models in the future.
Physical Review A (Atomic, Molecular and Optical Physics)
ultracold Cesium molecule, bound states, propagator method, avoided crossing, theory
, Tiesinga, E.
and Julienne, P.
Avoided crossings between bound states of ultracold Cesium dimers, Physical Review A (Atomic, Molecular and Optical Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842486
(Accessed November 28, 2023)