News

Quantum scientists demonstrate world-first 3D atomic-scale quantum chip architecture

08/01/2019

University: UNSW Sydney

Authors Centre Participants: Prof. Michelle Y. Simmons AO, Dr. Joris G. Keizer

Other Source: Nature Nanotechnology

UNSW researchers at the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) have shown for the first time that they can build atomic precision qubits in a 3D device – another major step towards a universal quantum computer.

The researchers, led by 2018 Australian of the Year and Director of CQC2T Professor Michelle Simmons, have demonstrated that they can extend their atomic qubit fabrication technique to multiple layers of a silicon crystal – achieving a critical component of the 3D chip architecture that they introduced to the world in 2015. This new research is published in Nature Nanotechnology.

The group is the first to demonstrate the feasibility of an architecture that uses atomic-scale qubits aligned to control lines – which are essentially very narrow wires – inside a 3D design.

What’s more, team members were able to align the different layers in their 3D device with nanometer precision – and showed they could read out qubit states with what’s called ‘single shot’, i.e. within one single measurement, with very high fidelity.

“This 3D device architecture is a significant advancement for atomic qubits in silicon,” says Professor Simmons.