COULOMB-BLOCKADE OF TUNNELING THROUGH A DOUBLE-QUANTUM DOT

We study the Coulomb blockade of tunneling through a double quantum do t. The temperature dependence of the linear conductance is strongly af fected by the interdot tunneling. As the tunneling grows, a crossover from temperature-independent peak conductance to a power-law suppressi on of conductance at low temperatures is predicted. This suppression i s a manifestation of the Anderson orthogonality catastrophe associated with the charge redistribution between the dots, which accompanies th e tunneling of an electron into a dot. We find analytically the shapes of the Coulomb blockade peaks in conductance as a function of gate vo ltage.