Transport through a coupled quantum dot system: Role of interdot interactions

The coupled double quantum dot system is modeled by a two impurity Anderson -type Hamiltonian and interdot Coulomb interaction is included. The conduct ance of this system is calculated using a nonequilibrium Green's-function f ormalism. We have evaluated conductance, peak splitting, and amplitude of c onductance peaks as a function of Fermi energy for various values of parame ters of the model Hamiltonian. It is demonstrated that an interdot interact ion whose strength is assumed to be 10% of the ondot Coulomb interaction pr oduces significant changes in the conductance in a coupled double quantum d ot system.