South West Quantum Technologies Project

Accelerator Fund

Project period: September 2015 – April 2016

This project has been developed from the Initiator funded Southwest Quantum Technologies Group (SWQT) community.

GW4 community leads
University of Bath:
Dr Peter Moseley
University of Bristol: Dr Ruth Oulton
Cardiff University: Professor Wolfgang Langbein
University of Exeter: Dr Janet Anders

Project overview

Quantum dots (QD) are solid-state quantum emitters, often known as “artificial atoms”. This solid-state technology has much to offer to Quantum Technologies, which aim to use quantum properties of particles to perform information processing. In order to address and control these QDs, they are embedded in micron-sized photonic circuits, which make use of the established semiconductor fabrication technology, and optical fibre interconnects offer a viable route to long-range scalable technologies.

We aim to establish a focused research group on the theme of QD quantum technologies, using the expertise of the GW4 institutions to explore enabling solutions. As a short term goal within the present project lifetime we will focus on practical solutions for QD technology.

Single photons from QD can be used to send absolutely secure messages and therefore may form the basis of future internet security. The physics we will learn from advancing the understanding of these semiconductor materials on the nanoscale will pave the way for future semiconductor devices using advanced materials technology.

We will run four separate but related work packages, two in experimental work and two in theoretical work. The final goal will be to present a blueprint of QD quantum information technology, including practical photonic designs for efficient QD photonic structures, and improved, QD-specific theoretical protocols that will allow efficient and scalable quantum information processing.