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Using a time-dependent Anderson Hamiltonian, a quantum dot with an ac voltageapplied to a nearby gate is investigated. A rich dependence of the linearresponse conductance on the external frequency and driving amplitude isdemonstrated. At low frequencies the ac potential produces sidebands of theKondo peak in the spectral density of the dot, resulting in a logarithmicdecrease in conductance over several decades of frequency. At intermediatefrequencies, the conductance of the dot displays an oscillatory behavior due tothe appearance of Kondo resonances of the satellites of the dot level. At highfrequencies, the conductance of the dot can vary rapidly due to the interplaybetween photon-assisted tunneling and the Kondo resonance.

Kondo physics in the single-electron transistor with ac driving