The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.
An addressable quantum dot qubit with fault-tolerant control-fidelity
Open accessAbstract
Exciting progress towards spin-based quantum computing has recently been made with qubits realized using nitrogen-vacancy centres in diamond and phosphorus atoms in silicon. For example, long coherence times were made possible by the presence of spin-free isotopes of carbon and silicon. However, despite promising single-atom nanotechnologies, there remain substantial challenges in coupling such qubits and addressing them individually. Conversely, lithographically defined quantum dots have an exchange coupling that can be precisely engineered, but strong coupling to noise has severely limited their dephasing times and control fidelities. Here, we combine the best aspects of both spin qubit schemes and demonstrate a gate-addressable quantum dot qubit in isotopically engineered silicon with a control fidelity of 99.6%, obtained via Clifford-based randomized benchmarking and consistent with that required for fault-tolerant quantum computing. This qubit has dephasing time T2* = 120 μs and coherence time T2 = 28 ms, both orders of magnitude larger than in other types of semiconductor qubit. By gate-voltage-tuning the electron g*-factor we can Stark shift the electron spin resonance frequency by more than 3,000 times the 2.4 kHz electron spin resonance linewidth, providing a direct route to large-scale arrays of addressable high-fidelity qubits that are compatible with existing manufacturing technologies.
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Cites
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“59%, above the threshold required for quantum error correction using surface codes[8].”
BackgroundMethodInfluentialSingle-shot read-out of an individual electron spin in a quantum dot
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BackgroundMethodRandomized benchmarking of quantum gates
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Cited by
Materials challenges and opportunities for quantum computing hardware
de Leon, N. P., Itoh, K. M., Kim, D., Mehta, K. K., Northup, T. E., Paik, H., Palmer, B. S., Samarth, N., Sangtawesin, S., & Steuerman, D. W. (2021) · Science · doi:10.1126/science.abb2823 · Cited by 710
Self-citationA Survey on quantum computing technology
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Self-citationFast universal quantum gate above the fault-tolerance threshold in silicon
Noiri, A., Takeda, K., Nakajima, T., Kobayashi, T., Sammak, A., Scappucci, G., & Tarucha, S. (2022) · Nature · doi:10.1038/s41586-021-04182-y · Cited by 471
A coherent spin–photon interface in silicon
Mi, X., Benito, M., Putz, S., Zajac, D. M., Taylor, J. M., Burkard, G., & Petta, J. R. (2018) · Nature · doi:10.1038/nature25769 · Cited by 432
Metadata
- Authors
- Veldhorst, M., Hwang, J. C. C., Yang, C. H., Leenstra, A. W., de Ronde, B., Dehollain, J. P., Muhonen, J. T., Hudson, F. E., Itoh, K. M., Morello, A., & Dzurak, A. S.
- Venue
- Nature Nanotechnology
- Published
- 2014-10-12
- Volume
- 9
- Issue
- 12
- Pages
- 981-985
- ISSN
- 1748-3387 (ISSN-L)
- 1748-3395
- OpenAlex
- W2047639422
- Cited by
- 940
- References
- 28
- FWCI
- 30.61
- Type
- journal article
- Language
- en
- Open access
- green
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- Veldhorst, M., Hwang, J. C. C., Yang, C. H., Leenstra, A. W., de Ronde, B., Dehollain, J. P., Muhonen, J. T., Hudson, F. E., Itoh, K. M., Morello, A., & Dzurak, A. S. (2014). An addressable quantum dot qubit with fault-tolerant control-fidelity. Nature Nanotechnology. https://doi.org/10.1038/nnano.2014.216
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