Three-body recombination at vanishing scattering lengths in an ultracold Bose gas

Abstract

We report on measurements of three-body recombination rates in an ultracold gas of ${}^7$Li atoms in the extremely nonuniversal regime where the two-body scattering length vanishes. We show that the rate is well defined and can be described by two-body parameters only: the scattering length $a$ and the effective range $R_e$. We find the rate to be energy independent, and, by connecting our results with previously reported measurements in the universal limit, we cover the behavior of the three-body recombination in the whole range from weak to strong two-body interactions. We identify a nontrivial magnetic field value in the nonuniversal regime where the rate should be strongly reduced.

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References in corpus (7)

• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Three-boson problem near a narrow Feshbach resonance
• Observation of universality in ultracold 7Li three-body recombination
• Observation of Efimov Resonances in a Mixture with Extreme Mass Imbalance
• Microscopic Origin and Universality Classes of the Efimov Three-Body Parameter
• Study of Efimov physics in two nuclear-spin sublevels of 7Li
• Contrasting the wide Feshbach resonances in ${}^6$Li and ${}^7$Li

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• Quantitative analysis of $p$-wave three-body losses via cascade process
• Strong spin-exchange recombination of three weakly interacting ${}^7$Li atoms
• From short-time diffusive to long-time ballistic dynamics: the unusual center-of-mass motion of quantum bright solitons
• Stabilization against collapse of 2D attractive Bose-Einstein condensates with repulsive, three-body interactions
• Magnetic Feshbach resonances in ${}^7\text{Li}{-}^{133}\text{Cs}$ mixtures
• Scaling Laws Governing the Collapse of a Bose-Einstein Condensate
• Can three-body recombination purify a quantum gas?