Resonance quantum switch: search for working parameters

TL;DR

This paper proposes a design for a three-terminal quantum switch using a circular quantum well and quantum wires, demonstrating control of current via electric field orientation in resonance conditions.

Contribution

It introduces a novel quantum switch design based on resonance in a quantum well-wire network and provides a solvable 1D model for analysis.

Findings

Current can be controlled by electric field orientation in resonance conditions

Design parameters depend on temperature, Fermi level, and electron effective mass

Switching speed is estimated based on the model

Abstract

Design of a three-terminal Quantum Switch is suggested in form of a network consisting of a circular quantum well and four semi-infinite single mode quantum wires attached to it. It is shown that in resonance case, when the Fermi level in the wires is close to some energy level in the well, the magnitude of the governing electric field on the well may be specified in such a way that the quantum current across the switch from the up-leading wire to the outgoing wires (terminals) can be controlled via rotation of the orthogonal projection of the governing electric field onto the plane of the device. The details of design of the switch are chosen in dependence of desired working temperature, available Fermi level and effective mass of electron. The speed of switching is estimated. A solvable model of the switch in form of a one-dimensional graph with a resonance vertex is suggested.