Universality of isolated -body resonances at large scattering length
arXiv:2303.12637 · doi:10.1103/PhysRevA.108.013315
Abstract
Non Efimovian -body resonances are investigated in the regime of a large two-body s wave scattering length. In view of a universal description of low-energy bound and quasi-bound states, a contact model is introduced. The modeling requires two parameters in addition to the scattering length. Using a modified scalar product, the contact model provides a normalization of bound states, possibly not square-integrable, that coincides with that of the corresponding finite range model.
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