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The Kondo effect in condensed-matter systems manifests itself most sharply intheir transport measurements. Here we propose an analogous transport signatureof the orbital Kondo effect realized with ultracold atoms. Our system consistsof imbalanced Fermi seas of two components of fermions and an impurity atom ofdifferent species which is confined by an isotropic potential. We first apply a\pi/2 pulse to transform two components of fermions into two superpositionstates. Their interactions with the impurity atom then cause a "transport" offermions from majority to minority superposition states, whose numbers can bemeasured after applying another 3\pi/2 pulse. In particular, when theinteraction of one component of fermions with the impurity atom is tuned closeto a confinement-induced p-wave or higher partial-wave resonance, the resultingconductance is shown to exhibit the Kondo signature, i.e., universallogarithmic growth by lowering the temperature. The proposed transportmeasurement will thus provide a clear evidence of the orbital Kondo effectaccessible in ultracold atom experiments and pave the way for developing newinsights into Kondo physics.

Transport measurement of the orbital Kondo effect with ultracold atoms