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arXiv · 1610.06153

Near Threshold Effects on Recombination and Vibrational Relaxation in Efimov Systems

D. Shu·I. Simbotin·R. Côté
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Abstract

We investigate the energy dependence of inelastic processes in systems which possess Efimov states. We consider the three-body recombination rate $K_3$ where three free atoms interact to produce an atom--dimer pair, and the relaxation rate $K_{\rm rel}$ 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 $K_3$, namely the NTR (Near Threshold Resonance) regime behavior $E^{-2}$ for negative scattering lengths and the NTS (Near Threshold Suppression) regime behavior $E^2$ for positive scattering lengths. We also confirm a previously found oscillatory behavior of $K_3$ at higher energy $E$. Finally, we find that $K_{\rm rel}$ behaves as $E^{-1}$ in the NTR regime.

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D. Shu, I. Simbotin, R. Côté. 2016-10-19. Near Threshold Effects on Recombination and Vibrational Relaxation in Efimov Systems. https://arxiv.org/abs/1610.06153

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