Avoided crossings between bound states of ultracold Cesium dimers

摘要: We present an efficient new computational method for calculating the binding energies of bound states ultracold alkali-metal dimers in presence magnetic fields. The is based on propagation coupled differential equations and does not use a basis set interatomic distance coordinate. It much more than previous radial allows many spin channels to be included. This particularly important vicinity avoided crossings between states. characterize number different Cs2 compare our converged calculations with experimental results. Small but significant discrepancies are observed both crossing strengths level positions, especially levels l symmetry (rotational angular momentum L = 8). should allow development improved potential models future.