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Avoided crossings between bound states of ultracold cesium dimers.

Hutson, Jeremy M. and Tiesinga, Eite and Julienne, Paul S. (2008) 'Avoided crossings between bound states of ultracold cesium dimers.', Physical review A., 78 (5). 052703.


We present an efficient computational method for calculating the binding energies of the bound states of ultracold alkali-metal dimers in the presence of magnetic fields. The 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 and allows many more spin channels to be included. This is particularly important in the vicinity of avoided crossings between bound states. We characterize a number of different avoided crossings in Cs2 and compare our converged calculations with experimental results. Small but significant discrepancies are observed in both crossing strengths and level positions, especially for levels with l symmetry (rotational angular momentum L=8). The discrepancies should allow the development of improved potential models in the future.

Item Type:Article
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Publisher statement:© 2008 The American Physical Society
Date accepted:No date available
Date deposited:12 July 2013
Date of first online publication:November 2008
Date first made open access:No date available

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