Observation of an Efimov-like resonance in ultracold atom-dimer scattering

Abstract

The field of few-body physics has originally been motivated by understanding nuclear matter. New model systems to experimentally explore few-body quantum systems can now be realized in ultracold gases with tunable interactions. Albeit the vastly different energy regimes of ultracold and nuclear matter (peV as compared to MeV), few-body phenomena are universal for near-resonant two-body interactions. Efimov states represent a paradigm for universal three-body states, and evidence for their existence has been obtained in measurements of three-body recombination in an ultracold gas of caesium atoms. Interacting samples of halo dimers can provide further information on universal few-body phenomena. Here we study interactions in an optically trapped mixture of such halo dimers with atoms, realized in a caesium gas at nanokelvin temperatures. We observe an atom-dimer scattering resonance, which we interpret as being due to a trimer state hitting the atom-dimer threshold. We discuss the close relation of this observation to Efimov's scenario, and in particular to atom-dimer Efimov resonances.

12 pages, 3 figures

References in corpus (15)

• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Universal Properties of the Four-Body System with Large Scattering Length
• Collisional stability of fermionic Feshbach molecules
• Inelastic collisions of ultra-cold heteronuclear molecules in an optical trap
• Analytical solution of the bosonic three-body problem
• Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
• Excited Thomas-Efimov levels in ultracold gases
• Range Corrections to Three-Body Observables near a Feshbach Resonance
• Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons
• Collisional decay of 87Rb Feshbach molecules at 1005.8 G
• N-body Efimov states of trapped bosons
• Resonant Dimer Relaxation in Cold Atoms with a Large Scattering Length
• Effective Range Corrections to Three-Body Recombination for Atoms with Large Scattering Length
• Experimental Evidence for Efimov Quantum States
• Four-body legacy of the Efimov effect

Cited by in corpus (52)

• Observation of an Efimov spectrum in an atomic system
• Observation of universality in ultracold 7Li three-body recombination
• Evidence for Universal Four-Body States Tied to an Efimov Trimer
• Observation of heteronuclear atomic Efimov resonances
• Radio Frequency Association of Efimov Trimers
• Comparing and contrasting nuclei and cold atomic gases
• Atom-Dimer Scattering in a Three-Component Fermi Gas
• Microscopic Origin and Universality Classes of the Efimov Three-Body Parameter
• Universal van der Waals Physics for Three Ultracold Atoms
• Ultracold atoms and the Functional Renormalization Group
• Study of Efimov physics in two nuclear-spin sublevels of 7Li
• A Feshbach resonance in collisions between ultracold ground state molecules
• Confinement-induced Efimov resonances in Fermi-Fermi mixtures
• Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths
• Efimov Trimer Formation via Ultracold Four-body Recombination
• Pinpointing Feshbach Resonances and Testing Efimov Universalities in ${}^{39}$K
• Crossover in the Efimov spectrum
• Universal three-body parameter in ultracold 4He*
• Three-body loss in lithium from functional renormalization
• Efimov physics from a renormalization group perspective
• Looking for "avalanche-mechanism" loss at an atom-molecule Efimov resonance
• Enhancing the Efimov correlation in Bose polarons with large mass imbalance
• Three-body repulsive forces among identical bosons in one dimension
• Atom-Dimer Scattering and Stability of Bose and Fermi Mixtures
• Onset of the Limit Cycle and Universal Three-Body Parameter in Efimov Physics
• Ultralong-range Rydberg molecules in combined electric and magnetic fields
• Renormalization Group Limit Cycle for Three-Stranded DNA
• Spectrum of Feshbach resonances in NaLi $+$ Na collisions
• Resonant Atom-Dimer Relaxation in Ultracold Atoms
• Anomalous frequency shifts in a one-dimensional trapped Bose gas
• Analytical thermodynamics of a strongly attractive three-component Fermi gas in one dimension
• Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium
• Reshaped Three-Body Interactions and the Observation of an Efimov State in the Continuum
• Low-temperature chemistry using the R-matrix method
• Feshbach spectroscopy of an ultracold ${}^{41}$K-${}^6$Li mixture and ${}^{41}$K atoms
• A coherent superposition of Feshbach dimers and Efimov trimers
• Three in Many: Efimov physics in the presence of a Fermi sea
• Probing the Efimov discrete scaling in atom-molecule collision
• Van der Waals universality in homonuclear atom-dimer elastic collisions
• Effective range from tetramer dissociation data for cesium atoms
• Efimov Physics in Atom-Dimer Scattering of Lithium-6 Atoms
• Efimov like phase of a three stranded DNA (Efimov-DNA) and the renormalization group limit cycle
• Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
• Cold atom-dimer reaction rates with ${}^4$He, ${}^{6,7}$Li and ${}^{23}$Na
• Efimov physics in the complex plane
• Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture
• Three-body recombination in a single-component Fermi gas with $p$-wave interaction
• Stabilization of three-body resonances to bound states in a continuum
• Shallow Trimers of Two Identical Fermions and One Particle in Resonant Regimes
• Observable Resonances in Efimov-unfavored Systems
• Efimov energy level rebounding off the atom-dimer continuum
• Mechanisms of anomalous three-body loss in a population-imbalanced three-component Fermi gas