Journal article
Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking
JT Muhonen, A Laucht, S Simmons, JP Dehollain, R Kalra, FE Hudson, S Freer, KM Itoh, DN Jamieson, JC McCallum, AS Dzurak, A Morello
Journal of Physics Condensed Matter | Published : 2015
Abstract
Building upon the demonstration of coherent control and single-shot readout of the electron and nuclear spins of individual 31P atoms in silicon, we present here a systematic experimental estimate of quantum gate fidelities using randomized benchmarking of 1-qubit gates in the Clifford group. We apply this analysis to the electron and the ionized 31P nucleus of a single P donor in isotopically purified 28Si. We find average gate fidelities of 99.95% for the electron and 99.99% for the nuclear spin. These values are above certain error correction thresholds and demonstrate the potential of donor-based quantum computing in silicon. By studying the influence of the shape and power of the contro..
View full abstractGrants
Awarded by Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology
Awarded by US Army Research Office
Funding Acknowledgements
We thank S Bartlett and S Flammia for illuminating discussions. This research was funded by the Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology (project number CE110001027) and the US Army Research Office (W911NF-13-1-0024). We acknowledge support from the Australian National Fabrication Facility and from the laboratory of Prof Robert Elliman at the Australian National University for the ion implantation facilities. The work at Keio has been supported in part by FIRST, the Core-to-Core Program by JSPS and the Grant-in-Aid for Scientific Research and Project for Developing Innovation Systems by MEXT.