Kondo correlations and the Fano effect in closed Aharonov-Bohm interferometers.

  title={Kondo correlations and the Fano effect in closed Aharonov-Bohm interferometers.},
  author={Walter Hofstetter and J{\"u}rgen K{\"o}nig and Herbert Schoeller},
  journal={Physical review letters},
  volume={87 15},
We study the Fano-Kondo effect in a closed Aharonov-Bohm (AB) interferometer which contains a single-level quantum dot and predict a frequency doubling of the AB oscillations as a signature of Kondo-correlated states. Using the Keldysh formalism, the Friedel sum rule, and the numerical renormalization group, we calculate the exact zero-temperature linear conductance G as a function of the AB phase phi and level position epsilon. In the unitary limit, G(phi) reaches its maximum 2e(2)/h at phi… CONTINUE READING

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