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Abstract: We investigate the occurrence of Borromean three-body continuum s-waveresonances, in an $\alpha\alpha\beta$ system for large negative two-bodyscattering lengths. The energy and width are determined by a scaling functionwith arguments given by energy ratios of the two-body virtual state subsystemenergies with the shallowest three-body bound state. The Borromean continuumresonances emerging from Efimov states present a peculiar behavior for trappedultracold atoms near a Feshbach resonance: two resonances with equal energiesat different values of the scattering length. The corresponding three-bodyrecombination peaks should merge as the temperature is raised, with one movingtowards lower values of the scattering length as the other moves to largervalues.



Autor: F. Bringas, M. T. Yamashita, T. Frederico, L. Tomio

Fuente: https://arxiv.org/







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