Properties of universal bosonic tetramers

Abstract

The system of four identical bosons is studied using momentum-space equations for the four-particle transition operators. Positions, widths and existence limits of universal unstable tetramers are determined with high accuracy. Their effect on the atom-trimer and dimer-dimer scattering observables is discussed. We show that a universal shallow tetramer intersects the atom-trimer threshold twice leading to resonant effects in ultracold atom-trimer collisions.

accepted for publication in special issue of Few-Body Systems devoted to Critical Stability 2011

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• Generalized Efimov scenario for heavy-light mixtures
• Nuclear Forces for Precision Nuclear Physics -- a collection of perspectives
• Efimov Physics and Connections to Nuclear Physics
• $N$-boson spectrum from a Discrete Scale Invariance
• Embedding nuclear physics inside the unitary window
• Three-body forces and Efimov physics in nuclei and atoms
• Temperature-dependence of small harmonically trapped atom systems with Bose, Fermi and Boltzmann statistics
• Three and four identical fermions near the unitary limit
• Tetramer Bound States in Heteronuclear Systems
• Tetramers of two heavy and two light bosons
• Efimov effect at the Kardar-Parisi-Zhang roughening transition
• Topological origin of universal few-body clusters in Efimov physics
• Four-boson bound states from a functional renormalisation group
• Trimer and Tetramer Bound States in Heteronuclear Systems
• The Four-Boson First-Excited State Near Two-Body Unitarity
• Window for Efimov physics for few-body systems with finite-range interactions
• Efimov universality with Coulomb interaction
• Efimov resonances above four-boson threshold
• Second excited state of ${}^4\mathrm{He}$ tetramer