On the Possibility of Using Semiconductor Nanocolumns for the Realization of Quantum Bits

TL;DR

This paper explores the potential of semiconductor nanocolumns with quantum dots for quantum bit implementation, focusing on device design, control mechanisms, and material feasibility.

Contribution

It introduces a novel approach using nanocolumn-based quantum dots for quantum computing, detailing control methods and material compatibility.

Findings

Feasibility of using conformal overgrowth for carrier confinement

Design concepts for quantum dot read-out and control

Assessment of material combinations for nanocolumns

Abstract

We propose the use of quantum dots formed in a semiconductor nanocolumn for the realization of charge or spin based quantum bits. The radial carrier confinement is achieved by employing conformal overgrowth, while multiple segmented gates are used to control the quantum dot properties. Different concepts for read-out and control are discussed. Furthermore, we assess which combinations of core nanowires and shell materials are feasible.