Efimov Enhanced Kondo Effect in Alkaline and Alkaline-Earth Atomic Gas Mixture

Abstract

Recent experiment has observed Feshbach resonances between alkaline and alkaline-earth atoms. These Feshbach resonances are insensitive to the nuclear spin of alkaline-earth atoms. Ultilizing this feature, we propose to take this system as a candidate to perform quantum simulation of the Kondo effect. An alkaline atom can form a molecule with an alkaline-earth atom with different nuclear spins, which plays the role of spin-exchange scattering responsible for the Kondo effect. Furthermore, we point out that the existence of three-body bound state and atom-molecule resonance due to the Efimov effect can enhance this spin-exchange scattering, and therefore enhance the Kondo effect. We discuss this mechanism first with a three-body problem in free space, and then demonstrate that the same mechanism still holds when the alkaline atom is localized by an external trap and becomes an impurity embedded in the alkaline-earth atomic gases.

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• Universality in Few-body Systems with Large Scattering Length
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• Three-body problem in Fermi gases with short-range interparticle interaction
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• Solving quantum impurity problems in and out of equilibrium with variational approach
• Transport measurement of the orbital Kondo effect with ultracold atoms
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• Calibration of Interaction Energy between Bose and Fermi Superfluids
• The bosonic Kondo effect
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• Realization of SU(N) Kondo effect in strong magnetic field
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Cited by in corpus (6)

• Feshbach resonances in $p$-wave three-body recombination within Fermi-Fermi mixtures of open-shell ${}^6$Li and closed-shell ${}^{173}$Yb atoms
• Phase diagram and dynamics of the SU($\mathbf{N}$) symmetric Kondo lattice model
• Observation of state-to-state hyperfine-changing collision in a Bose-Fermi mixture of ${}^6$Li and ${}^{41}$K atoms
• Asymmetric Conductivity of the Kondo Effect in Cold Atomic Systems
• Kondo Effect in a Spin-3/2 Fermi Gas
• Experimental study of tune-out wavelengths for spin-dependent optical lattice in ${}^{87}$Rb Bose-Einstein condensation