Shot noise of the hybrid double-quantum-dot Aharonov-Bohm interferometer coupled to normal and superconductive terminals

Abstract

The shot noise of double-quantum-dot interferometer connected to normal metal and superconductor is investigated by employing the nonequilibrium Green's function approach. The gate voltages control the Aharonov-Bohm oscillation structure of shot noise, and the oscillation peaks can be converted to valleys by changing the gate voltages. The Andreev-reflection-generated shot noise is suppressed resulting from the interference effect and bias voltages. The asymmetric Fano factor with respect to the gate voltages exhibits the peak-valley resonant structure.