2010/05/14 by Francis Bringas, F. Bringas, Bringas, F. +7
Physics and Astronomy · #Advanced Chemical Physics Studies #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.quant-gas #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.1005.2576
arxiv created 2010/05/14 · arxiv updated 2015/03/16
We investigate the occurrence of Borromean three-body continuum s-wave resonances, in an ααβ 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.