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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


Hutson, J. , Tiesinga, E. and Julienne, P. (2008), Avoided crossings between bound states of ultracold Cesium dimers, Physical Review A (Atomic, Molecular and Optical Physics), [online], (Accessed May 21, 2024)


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Created November 4, 2008, Updated October 12, 2021