Enhancing the Observability of the Efimov Effect in Ultracold Atomic Gas Mixtures

Abstract

We discuss the prospects for observing the characteristic features of the Efimov effect in a two-component ultracold atomic gas near an interspecies Feshbach resonance. In the ultracold regime, the Efimov effect is expected to be manifested in the three-body collision rates through the appearance of series of minima or maxima as a function of the two-body s-wave scattering length $a$. Here, we propose the observation of this Efimov physics through measurements of the inelastic three-body rate constants near a Feshbach resonance. Our analysis suggests that boson-fermion mixtures, where the bosons are much heavier than the fermions, are the most favorable system to observe such features.

4 pages, 2 figures

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• Efimov Physics in Cold Atoms
• Observation of the Second Triatomic Resonance in Efimov's Scenario
• Cold and trapped metastable noble gases
• Efimov Resonances in Ultracold Quantum Gases
• Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
• Observation of interspecies Li-Cs Feshbach resonances
• Three-body problem in heteronuclear mixtures with resonant interspecies interaction
• Ultracold mixtures of atomic Li-6 and Cs-133 with tunable interactions
• Excited Thomas-Efimov levels in ultracold gases
• Quantum Bose-Fermi droplets
• Breakdown of universality for unequal-mass Fermi gases with infinite scattering length
• Generalized Efimov scenario for heavy-light mixtures
• Universal four-body states in heavy-light mixtures with positive scattering length
• Three-body recombination in heteronuclear mixtures at finite temperature
• From Efimov Physics to the Bose Polaron using Gaussian States
• Role of the intraspecies scattering length in the Efimov scenario with large mass difference
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Calculation of three-body resonances using slow-variable discretization coupled with complex absorbing potential
• Analyzing Feshbach resonances -- A ${}^6$Li -${}^{133}$Cs case study
• The three-body parameter for Efimov states in lithium-6
• Few-body resonances of unequal-mass systems with infinite interspecies two-body s-wave scattering length
• Efimov states embedded in the three-body continuum
• Low-temperature chemistry using the R-matrix method
• Few-body physics of ultracold atoms and molecules with long-range interactions
• Low temperature scattering with the R-matrix method: argon-argon scattering
• Exact solution of the three-boson problem at vanishing energy
• Efimov resonance position near a narrow Feshbach resonance in ${}^6$Li-${}^{133}$Cs mixture
• Experimental realization of BCS-BEC crossover physics with a Fermi gas of atoms
• Weakly bound LiHe${}_2$ molecules in the framework of three-dimensional Faddeev equations
• Phase Equilibrium of Binary Mixtures in Mixed Dimensions
• An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of ${}^6$Li and ${}^{133}$Cs atoms
• Observability of the Efimov spectrum in an electron-atom-atom system
• Window for Efimov physics for few-body systems with finite-range interactions