Proposal to directly observe the Kondo effect through enhanced photo-induced scattering of cold fermionic and bosonic atoms

Abstract

We propose an experimental protocol to directly observe the Kondo effect by scattering ultracold atoms with spin-dependent interactions. We propose using an optical Feshbach resonance to engineer Kondo-type spin-dependent interactions in a system with ultracold ${}^6$Li and ${}^{87}$Rb gases. We calculate the momentum transferred from the ${}^{87}$Rb gas to the ${}^6$Li gas in a scattering experiment and show that it has a logarithmically enhanced temperature dependence, characteristic of the Kondo effect and analogous to the resistivity of alloys with magnetic impurities. Experimentally detecting this enhancement will give a different perspective on the Kondo effect, and allow us to explore a rich variety of problems such as the Kondo lattice problem and heavy-fermion systems.

11 pages, 8 figures; Modified Figure 1; Added subsection IVa; Conclusions unchanged

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• Tuning the scattering length with an optically induced Feshbach resonance
• A Quantum Gas Microscope for Fermionic Atoms
• Site-resolved Imaging of Fermionic Lithium-6 in an Optical Lattice
• Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms
• Site-resolved imaging of ytterbium atoms in a two-dimensional optical lattice
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• Direct Observation of Resonant Scattering Phase Shifts and their Energy Dependence
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Cited by in corpus (5)

• Transport measurement of the orbital Kondo effect with ultracold atoms
• Collective excitations in two-dimensional SU($N$) Fermi gases with tunable spin
• Synthetic topological Kondo insulator in a pumped optical cavity
• Kondo Length in Bosonic Lattices
• Quantum dimer models emerging from large-spin ultracold atoms