Efimov Resonances in Ultracold Quantum Gases

Abstract

Ultracold atomic gases have developed into prime systems for experimental studies of Efimov three-body physics and related few-body phenomena, which occur in the universal regime of resonant interactions. In the last few years, many important breakthroughs have been achieved, confirming basic predictions of universal few-body theory and deepening our understanding of such systems. We review the basic ideas along with the fast experimental developments of the field, focussing on ultracold cesium gases as a well-investigated model system. Triatomic Efimov resonances, atom-dimer Efimov resonances, and related four-body resonances are discussed as central observables. We also present some new observations of such resonances, supporting and complementing the set of available data.

23 pages, 13 figures

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• Weakly bound dimers of fermionic atoms
• Observation of an Efimov spectrum in an atomic system
• Collisional stability of a three-component degenerate Fermi gas
• Three-body recombination in a three-state Fermi gas with widely tunable interactions
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Control of Interaction-Induced Dephasing of Bloch Oscillations
• Atomic three-body loss as a dynamical three-body interaction
• Three-boson problem near a narrow Feshbach resonance
• Observation of universality in ultracold 7Li three-body recombination
• Observation of an Efimov-like resonance in ultracold atom-dimer scattering
• Evidence for Universal Four-Body States Tied to an Efimov Trimer
• Universal Properties of the Four-Body System with Large Scattering Length
• Observation of heteronuclear atomic Efimov resonances
• Two-dimensional Bose-Einstein condensate in an optical surface trap
• Virial expansion for a strongly correlated Fermi gas
• Radio Frequency Association of Efimov Trimers
• Scattering Length Scaling Laws for Ultracold Three-Body Collisions
• Universal Fermi gases in mixed dimensions
• Limits on Universality in Ultracold Three-Boson Recombination
• Atom-Dimer Scattering in a Three-Component Fermi Gas
• Optimized production of a cesium Bose-Einstein condensate
• Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
• Four-boson scale near a Feshbach resonance
• Spectrum and Dynamics of the BCS-BEC crossover from a few-body perspective
• Excited Thomas-Efimov levels in ultracold gases
• Energetics and structural properties of three-dimensional bosonic clusters near threshold
• The Efimov effect for three interacting bosonic dipoles
• The Efimov effect in lithium 6
• Confinement-induced Efimov resonances in Fermi-Fermi mixtures
• Crossover in the Efimov spectrum
• 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
• Resonant Atom-Dimer Relaxation in Ultracold Atoms
• Experimental Evidence for Efimov Quantum States

Cited by in corpus (101)

• Efimov Physics: a review
• Universal few-body physics and cluster formation
• Effective field theory description of halo nuclei
• Observation of the Second Triatomic Resonance in Efimov's Scenario
• Two-dimensional dynamics of expansion of a degenerate Bose gas
• Lifetime of the Bose Gas with Resonant Interactions
• General relations for quantum gases in two and three dimensions. II. Bosons and mixtures
• Universality of the three-body Efimov parameter at narrow Feshbach resonances
• Two and Three-body Contacts in the Unitary Bose Gas
• Feshbach resonances, weakly bound molecular states and coupled-channel potentials for cesium at high magnetic fields
• Analyzing a Bose polaron across resonant interactions
• Stability of a unitary Bose gas
• Emergence of multi-body interactions in few-atom sites of a fermionic lattice clock
• Microscopic Origin and Universality Classes of the Efimov Three-Body Parameter
• Observation of interspecies Li-Cs Feshbach resonances
• Three-Body Interacting Bosons in Free Space
• Halos and related structures
• Few-body physics in resonantly interacting ultracold quantum gases
• Physical Origin of the Universal Three-body Parameter in Atomic Efimov Physics
• Ultracold mixtures of atomic Li-6 and Cs-133 with tunable interactions
• Universal van der Waals Physics for Three Ultracold Atoms
• Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
• Ultracold atoms and the Functional Renormalization Group
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Feshbach resonances in potassium Bose-Bose mixtures
• Supplementary information to "Efimov-driven phase transitions of the unitary Bose gas"
• Efimov-driven phase transitions of the unitary Bose gas
• Observation of Efimov molecules created from a resonantly interacting Bose gas
• Observation of a Strong Atom-Dimer Attraction in a Mass-Imbalanced Fermi-Fermi Mixture
• High order exceptional points in ultracold Bose gases
• Heteronuclear Efimov scenario with positive intraspecies scattering length
• Correlations imposed by the unitary limit between few-nucleon systems, nuclear matter and neutron stars
• Optical Feshbach resonances: Field-dressed theory and comparison with experiments
• Universality and scaling in the $N$-body sector of Efimov physics
• Strongly correlated Bose gases
• Resonant Five-body Recombination in an Ultracold Gas of Bosonic Atoms
• Efimov Physics and Connections to Nuclear Physics
• Direct Measurements of Collisional Dynamics in Cold Atom Triads
• Three-body recombination in heteronuclear mixtures at finite temperature
• $N$-boson spectrum from a Discrete Scale Invariance
• Observation of Efimov Universality across a Non-Universal Feshbach Resonance in \textsuperscript{39}K
• Three-body recombination at vanishing scattering lengths in an ultracold Bose gas
• Analytical model of overlapping Feshbach resonances
• Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture
• Effective-range approximations for resonant scattering of cold atoms
• Crossover trimers connecting continuous and discrete scaling regimes
• Efimov-van-der-Waals universality for ultracold atoms with positive scattering lengths
• Role of the intraspecies scattering length in the Efimov scenario with large mass difference
• Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths
• Third virial coefficient of the unitary Bose gas
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Probing strongly interacting atomic gases with energetic atoms
• Universality in Efimov associated tetramers in 4He
• Reaction kinetics of ultracold molecule-molecule collisions
• Universal Relations for Range Corrections to Efimov Features
• Efimov trimers under strong confinement
• Efimov physics with $1/2$ spin-isospin fermions
• Finite-range effects in Efimov physics beyond the separable approximation
• The three-body parameter for Efimov states in lithium-6
• Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances
• Matching universal behavior with potential models
• Universal range corrections to the Efimov trimer for a class of paths to the unitary limit
• Tunable Polarons in Bose-Einstein Condensates
• Active stabilization of kilogauss magnetic fields to the ppm level for magnetoassociation on ultranarrow Feshbach resonances
• Saturation properties of helium drops from a Leading Order description
• The multichannel nature of three-body recombination for ultracold ${}^{39}$K
• From few to many bosons inside the unitary window: a transition between universal to non-universal behavior
• Multichannel effects in the Efimov regime from broad to narrow Feshbach resonances
• Towards photoassociation processes of ultracold rubidium trimers
• Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium
• Recombination rates from potential models close to the unitary limit
• Impact of the transverse direction on the many-body tunneling dynamics in a two-dimensional bosonic Josephson junction
• Universality in Four-Boson Systems
• Low-temperature chemistry using the R-matrix method
• Magnetic quantum number resolved state-to-state chemistry
• Three-body Physics in Strongly Correlated Spinor Condensates
• Rydberg optical Feshbach resonances in cold gases
• Dispersive optical detection of magnetic Feshbach resonances in ultracold gases
• Core momentum distribution in two-neutron halo nuclei
• Effective range from tetramer dissociation data for cesium atoms
• Van der Waals universality in homonuclear atom-dimer elastic collisions
• The 3-body Coulomb problem
• Observation of Anomalous Decay of a Polarized Three-Component Fermi Gas
• Few-body physics of ultracold atoms and molecules with long-range interactions
• Low temperature scattering with the R-matrix method: argon-argon scattering
• Efficient three-body calculations with a two-body mapped grid method
• Universal behaviour of four-boson systems from a functional renormalisation group
• Atom Loss Resonances in a Bose-Einstein Condensate
• Four-boson bound states from a functional renormalisation group
• Fermions meet two bosons -- the heteronuclear Efimov effect revisited
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Temperature dependence of an Efimov resonance in ${}^{39}\mathrm{K}$
• Efimov states in Li-Cs mixtures within a minimal model
• Universal bound states and resonances with Coulomb plus short-range potentials
• An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of ${}^6$Li and ${}^{133}$Cs atoms
• Exploring the Strongly-Interacting Regime of Effective Multi-Body Interactions in a Trapped Ultracold Atom System
• Efimov Trimers near the Zero-crossing of a Feshbach Resonance
• Energetics and structural properties of two- and three-boson systems in the presence of 1D spin-orbit coupling
• The fractal geometry and the mapping of Efimov states to Bloch states
• Few-boson system with a single impurity: Universal bound states tied to Efimov trimers
• Photoassociation of Universal Efimov Trimers