CONDUCTANCE SPECTROSCOPY IN COUPLED QUANTUM DOTS

We investigate the linear-response conductance through a pair of coupl ed quantum dots. The conductance spectrum under ideal conditions is sh own to consist of two sets of twin peaks whose locations and amplitude s are determined by the interdot coupling and the intradot charging. W e will show that the qualitative features of the spectrum survive agai nst experimental nonidealities such as (1) detuning of the individual dots, (2) interdot charging, (3) inelastic scattering, and (4) multipl e lateral states. The effect of higher lateral states depends strongly on the nature of the interaction potential, screening lengths, and ex change terms, but the lowest set of twin peaks is largely unaffected b y these details.