David Jamieson

An electrically driven single-atom "flip-flop" qubit.

Rostyslav Savytskyy, Tim Botzem, Irene Fernandez de Fuentes, Benjamin Joecker, Jarryd J Pla, Fay E Hudson, Kohei M Itoh, Alexander M Jakob, Brett C Johnson, David N Jamieson, Andrew S Dzurak, Andrea Morello

Journal article  |  2023  |  Sci Adv

The spins of atoms and atom-like systems are among the most coherent objects in which to store quantum information. However, the n..

Reproducibility and Gap Control of Superconducting Flux Qubits

T Chang, I Holzman, T Cohen, BC Johnson, DN Jamieson, M Stern

Journal article  |  2022  |  PHYSICAL REVIEW APPLIED

Superconducting flux qubits are promising candidates for the physical realization of a scalable quantum processor. Indeed, these c..

Beating the Thermal Limit of Qubit Initialization with a Bayesian Maxwell?s Demon

Mark A Johnson, Mateusz T Madzik, Fay E Hudson, Kohei M Itoh, Alexander M Jakob, David N Jamieson, Andrew Dzurak, Andrea Morello

Journal article  |  2022  |  PHYSICAL REVIEW X

Fault-tolerant quantum computing requires initializing the quantum register in a well-defined fiducial state. In solid-state syste..

Near-Surface Electrical Characterization of Silicon Electronic Devices Using Focused keV-Range Ions

SG Robson, P Raecke, AM Jakob, N Collins, HR Firgau, V Schmitt, V Mourik, A Morello, E Mayes, D Spemann, DN Jamieson

Journal article  |  2022  |  PHYSICAL REVIEW APPLIED

The demonstration of universal quantum logic operations near the fault-tolerance threshold has established ion-implanted near-surf..

Precision tomography of a three-qubit donor quantum processor in silicon

Mateusz T Madzik, Serwan Asaad, Akram Youssry, Benjamin Joecker, Kenneth M Rudinger, Erik Nielsen, Kevin C Young, Timothy J Proctor, Andrew D Baczewski, Arne Laucht, Vivien Schmitt, Fay E Hudson, Kohei M Itoh, Alexander M Jakob, Brett C Johnson, David N Jamieson, Andrew S Dzurak, Christopher Ferrie, Robin Blume-Kohout, Andrea Morello

Journal article  |  2022  |  NATURE

Nuclear spins were among the first physical platforms to be considered for quantum information processing1,2, because of their exc..

Deterministic Shallow Dopant Implantation in Silicon with Detection Confidence Upper‐Bound to 99.85% by Ion–Solid Interactions (Adv. Mater. 3/2022)

Alexander M Jakob, Simon G Robson, Vivien Schmitt, Vincent Mourik, Matthias Posselt, Daniel Spemann, Brett C Johnson, Hannes R Firgau, Edwin Mayes, Jeffrey C McCallum, Andrea Morello, David N Jamieson

Journal article  |  2022  |  Advanced Materials

Deterministic Shallow Dopant Implantation in Silicon with Detection Confidence Upper-Bound to 99.85% by Ion-Solid Interactions

Alexander M Jakob, Simon G Robson, Vivien Schmitt, Vincent Mourik, Matthias Posselt, Daniel Spemann, Brett C Johnson, Hannes R Firgau, Edwin Mayes, Jeffrey C McCallum, Andrea Morello, David N Jamieson

Journal article  |  2021  |  ADVANCED MATERIALS

Silicon chips containing arrays of single dopant atoms can be the material of choice for classical and quantum devices that exploi..

High-resolution Rutherford backscattering spectrometry with an optimised solid-state detector

SG Robson, AM Jakob, D Holmes, SQ Lim, BC Johnson, DN Jamieson

Journal article  |  2021  |  NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Rutherford Backscattering Spectrometry (RBS) is a powerful ion beam analysis technique in frequent use within materials science. T..

Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device

Mateusz T Madzik, Arne Laucht, Fay E Hudson, Alexander M Jakob, Brett C Johnson, David N Jamieson, Kohei M Itoh, Andrew S Dzurak, Andrea Morello

Journal article  |  2021  |  NATURE COMMUNICATIONS

Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an..

Isotopic enrichment of silicon by high fluence Si-28(-) ion implantation

D Holmes, BC Johnson, C Chua, B Voisin, S Kocsis, S Rubanov, SG Robson, JC McCallum, DR McCamey, S Rogge, DN Jamieson

Journal article  |  2021  |  PHYSICAL REVIEW MATERIALS

Spins in the "semiconductor vacuum"of silicon-28 (Si28) are suitable qubit candidates due to their long coherence times. An isotop..