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

@article{Hofstetter2001KondoCA,
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},
year={2001},
volume={87 15},
pages={156803}
}

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