Employing confinement induced resonances to realize Kondo physics with ultracold atoms

We recently proposed a novel realization of Kondo physics with ultracold atomic gases and illustrated that a mixture of ⁴⁰K and ²³Na atoms has suitable properties for the generation of a Kondo-correlated state with experimentally accessible scales. This system fortuitously satisfies rather special conditions. Here we discuss an alternative realization based on confinement induced resonances which could also be applicable for other mixtures. We first explain the general principle of how to engineer the Kondo correlated state like this. Then we present results for local spectral functions from numerical renormalization group (NRG) calculations for the appropriate effective Anderson impurity model and also predict the experimentally measurable radio frequency response