Shallow Efimov tetramer as inelastic virtual state and resonant enhancement of the atom-trimer relaxation

Abstract

We use exact four-boson scattering equations in the momentum-space framework to study the universal properties of shallow Efimov tetramers and their dependence on the two-boson scattering length. We demonstrate that, in contrast to previous predictions, the shallow tetramer in a particular experimentally unexplored regime is not an unstable bound state but an inelastic virtual state. This leads to a resonant behaviour of the atom-trimer scattering length and thereby to a resonant enhancement of the trimer relaxation in ultracold atom-trimer mixtures.

updated: 6 pages, 1 table, 6 figures

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Cited by in corpus (22)

• Efimov Physics: a review
• Few-body physics with ultracold atomic and molecular systems in traps
• Effective field theory description of halo nuclei
• Few-body physics in resonantly interacting ultracold quantum gases
• Universality of an impurity in a Bose-Einstein condensate
• Momentum-space calculation of four-boson recombination
• Calculation of multichannel reactions in the four-nucleon system above breakup threshold
• Properties of universal bosonic tetramers
• Universality in bosonic dimer-dimer scattering
• Matching universal behavior with potential models
• Three-body forces and Efimov physics in nuclei and atoms
• Few-body states of bosons interacting with a heavy quantum impurity
• Many Bosons in a Narrow Magnetic Feshbach Resonance
• Universal bosonic tetramers of dimer-atom-atom structure
• Universality in fermionic dimer-dimer scattering
• Topological origin of universal few-body clusters in Efimov physics
• Four-boson bound states from a functional renormalisation group
• Dimer-atom-atom recombination in the universal four-boson system
• Universal four-boson system: dimer-atom-atom Efimov effect and recombination reactions
• The Four-Boson First-Excited State Near Two-Body Unitarity
• Second excited state of ${}^4\mathrm{He}$ tetramer
• Few-boson system with a single impurity: Universal bound states tied to Efimov trimers