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Avoided crossings between bound states of ultracold cesium dimers

Hutson, Jeremy M.; Tiesinga, Eite; Julienne, Paul S.

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Eite Tiesinga

Paul S. Julienne


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.


Hutson, J. M., Tiesinga, E., & Julienne, P. S. (2008). Avoided crossings between bound states of ultracold cesium dimers. Physical Review A, 78(5), Article 052703.

Journal Article Type Article
Publication Date Nov 1, 2008
Deposit Date Jun 19, 2013
Publicly Available Date Jul 12, 2013
Journal Physical Review A
Print ISSN 1050-2947
Electronic ISSN 1094-1622
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 78
Issue 5
Article Number 052703


Published Journal Article (225 Kb)

Copyright Statement
© 2008 The American Physical Society

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