Valley blockade quantum switching in Silicon nanostructures

TL;DR

This paper introduces the concept of valley blockade in Silicon nanostructures, proposing a quantum switch that leverages valley parity conservation to control electron transport, representing a novel hybrid quantum-classical logic device.

Contribution

It defines the valley parity operator and demonstrates a Silicon quantum switch based on valley parity conservation, a new approach in quantum transport control.

Findings

Valley blockade is governed by parity conservation of valley eigenvectors.

A Silicon quantum changeover switch utilizing valley parity is proposed.

The device functions as a hybrid quantum-classical logic element.

Abstract

In analogy to the Coulomb and the Pauli spin blockade, based on the electrostatic repulsion and the Pauli exclusion principle respectively, the concept of valley blockade in Silicon nanostructures is explored. The valley parity operator is defined. Valley blockade is determined by the parity conservation of valley composition eigenvectors in quantum transport. A Silicon quantum changeover switch based on a triple of donor quantum dots capable to separate electrons having opposite valley parity by virtue of the valley parity conservation is proposed. The quantum changeover switch represents a novel kind of hybrid quantum based classical logic device.