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Updated: Mar 13, 2026

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Published on: August 6, 2018
Near Threshold Effects on Recombination and Vibrational Relaxation in Efimov Systems
Di Shu1, Ionel Simbotin1, Robin Côté1
1Department of Physics, University of Connecticut, Storrs, CT, 06268, USA.
Abstract:
We investigate the energy dependence of inelastic processes in systems which possess Efimov states. We consider the three-body recombination rate K3 where three free atoms interact to produce an atom-dimer pair, and the relaxation rate Krel where an atom quenches a weakly bound state of a dimer near an Efimov resonance to more deeply bound levels. Using a model capturing the key features of the Efimov problem, we identify new energy regimes for K3 , namely the near threshold resonance (NTR) regime behavior E-2 for negative scattering lengths and the near threshold suppression (NTS) regime behavior E2 for positive scattering lengths. We also confirm a previously found oscillatory behavior of K3 at higher energy E. Finally, we find that Krel behaves as E-1 in the NTR regime.
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