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Muhonen JT, Laucht A, Simmons S, et al. Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking. J Phys Condens Matter. 2015;27(15):154205doi: 10.1088/0953-8984/27/15/154205.
Muhonen, J. T., Laucht, A., Simmons, S., Dehollain, J. P., Kalra, R., Hudson, F. E., Freer, S., Itoh, K. M., Jamieson, D. N., McCallum, J. C., Dzurak, A. S., & Morello, A. (2015). Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking. Journal of physics. Condensed matter : an Institute of Physics journal, 27(15), 154205. https://doi.org/10.1088/0953-8984/27/15/154205
Muhonen, J T, et al. "Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking." Journal of physics. Condensed matter : an Institute of Physics journal vol. 27,15 (2015): 154205. doi: https://doi.org/10.1088/0953-8984/27/15/154205
Muhonen JT, Laucht A, Simmons S, Dehollain JP, Kalra R, Hudson FE, Freer S, Itoh KM, Jamieson DN, McCallum JC, Dzurak AS, Morello A. Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking. J Phys Condens Matter. 2015 Apr 22;27(15):154205. doi: 10.1088/0953-8984/27/15/154205. Epub 2015 Mar 18. PMID: 25783435.
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J Phys Condens Matter. 2015 Apr 22;27(15):154205. doi: 10.1088/0953-8984/27/15/154205. Epub 2015 Mar 18.

Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking.

Journal of physics. Condensed matter : an Institute of Physics journal

J T Muhonen, A Laucht, S Simmons, J P Dehollain, R Kalra, F E Hudson, S Freer, K M Itoh, D N Jamieson, J C McCallum, A S Dzurak, A Morello

Affiliations

  1. Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, UNSW Australia, Sydney, NSW 2052, Australia.

PMID: 25783435 DOI: 10.1088/0953-8984/27/15/154205

Abstract

Building upon the demonstration of coherent control and single-shot readout of the electron and nuclear spins of individual (31)P 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 (31)P nucleus of a single P donor in isotopically purified (28)Si. 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 control pulses, we find evidence that the present limitation to the gate fidelity is mostly related to the external hardware and not the intrinsic behaviour of the qubit.

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