Double resonances in Borromean heteronuclear triatomic systems
Abstract
We investigate the occurrence of Borromean three-body continuum s-wave resonances, in an system for large negative two-body scattering lengths. The energy and width are determined by a scaling function with arguments given by energy ratios of the two-body virtual state subsystem energies with the shallowest three-body bound state. The Borromean continuum resonances emerging from Efimov states present a peculiar behavior for trapped ultracold atoms near a Feshbach resonance: two resonances with equal energies at different values of the scattering length. The corresponding three-body recombination peaks should merge as the temperature is raised, with one moving towards lower values of the scattering length as the other moves to larger values.
Cite
@article{arxiv.1005.2576,
title = {Double resonances in Borromean heteronuclear triatomic systems},
author = {F. Bringas and M. T. Yamashita and T. Frederico and L. Tomio},
journal= {arXiv preprint arXiv:1005.2576},
year = {2015}
}