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Electron transport through a strongly correlated quantum dot (QD) embedded inan Aharonov-Bohm (AB) ring is investigated with the aid of the finite-Uslave-boson mean-field (SBMF) approach extended to nonequilibrium regime. Anonequilibrium steady state (NESS) of the mean-field Hamiltonian is constructedwith the aid of the C*-algebraic approach for studying infinitely extendedsystems. In the linear response regime, the Fano-Kondo resonances and ABoscillations of the conductance obtained from the SBMF approach are in goodagreement with those from the numerical renormalization group technique (NRG)by Hofstetter et al. by using twice larger Coulomb interaction. At zerotemperature and finite bias voltage, the resonance peaks of the differentialconductance tend to split into two. At low bias voltage, the split of theasymmetric resonance can be observed as an increase of the conductance plateau.We also found that the differential conductance has zero-bias maximum orminimum depending on the background transmission via direct tunneling betweenthe electrodes.Comment: 24 pages,17 figure

Nonequilibrium Steady States and Fano–Kondo Resonances in an AB Ring with a Quantum Dot