A single electron transistor with quantum rings

Abstract: We Have developed the concept of a new kind of single-electron transistor in which the transport of the electron through a quantum wire is controlled by charged quantum rings. Using a 2D harmonic potential as the transverse constraint, we numerically investigated the transport of the electron through the wire. We have shown that in the low energy limit, for a suitable configuration of the rings, called the quadrupole configuration, we are able to adjust the conductance of the wire and therefore control the switching process.