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We present a detailed theoretical investigation of the effect of Coulombinteractions on electron transport through quantum dots and double barrierstructures connected to a voltage source via an arbitrary linear impedance.Combining real time path integral techniques with the scattering matrixapproach we derive the effective action and evaluate the current-voltagecharacteristics of quantum dots at sufficiently large conductances. Ouranalysis reveals a reach variety of different regimes which we specify indetails for the case of chaotic quantum dots. At sufficiently low energies theinteraction correction to the current depends logarithmically on temperatureand voltage. We identify two different logarithmic regimes with the crossoverbetween them occurring at energies of order of the inverse dwell time ofelectrons in the dot. We also analyze the frequency-dependent shot noise inchaotic quantum dots and elucidate its direct relation to interaction effectsin mesoscopic electron transport.Comment: 21 pages, 4 figures. References added, discussion slightly extende

Electron transport through interacting quantum dots in the metallic regime