Transport through a non-Hermitian parallel double-quantum-dot structure in the presence of interdot Coulomb interaction

In this work, we investigate the effect of PT-symmetric complex potentials on the transport properties of one non-Hermitian system, which is formed by a parallel coupled double-quantum-dot geometry. It is found that the PT-symmetric complex potentials take pronounced effects to the transport properties of such a system, manifested as the occurrence of antiresonance. In the presence of the interdot Coulomb interaction, such potentials lead to the shift and increase of the antiresonance points, dependent on the Coulomb interaction strength. This study exhibits the special impact of the interplay between the interdot Coulomb interaction and PT-symmetric potentials on the quantum transport behaviors. (C) 2017 Elsevier Ltd. All rights reserved.