Published February 2, 2022
| Version v1
Journal article
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Five-second coherence of a single spin with single-shot readout in silicon carbide
Creators
- 1. University of Chicago
- 2. National Institutes for Quantum Science and Technology
- 3. Linköping University
Description
An outstanding hurdle for defect spin qubits in silicon carbide (SiC) is single-shot readout, a deterministic measurement of the quantum state. Here, we demonstrate single-shot readout of single defects in SiC via spin-to-charge conversion, whereby the defect's spin state is mapped onto a long-lived charge state. With this technique, we achieve over 80% readout fidelity without pre- or postselection, resulting in a high signal-to-noise ratio that enables us to measure long spin coherence times. Combined with pulsed dynamical decoupling sequences in an isotopically purified host material, we report single-spin T2 > 5 seconds, over two orders of magnitude greater than previously reported in this system. The mapping of these coherent spin states onto single charges unlocks both single-shot readout for scalable quantum nodes and opportunities for electrical readout via integration with semiconductor devices.
Data availability
All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.Files
sciadv.abm5912.pdf
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(2.0 MB)
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Supplementary materials md5:4659e89097b8f132343caece9452a288 |
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Additional details
Identifiers
- DOI
- 10.1126/sciadv.abm5912
- Other
- oai:uchicago.tind.io:10956
Funding
- National Science Foundation
- DMR-1420709
- National Science Foundation
- ECCS-1542205
- Boeing
- Office of Naval Research
- N00014-17-1-3026
- U.S. Department of Energy
- National Quantum Information Science Research Centers
- U.S. Department of Energy
- Office of Basic Energy Sciences, Materials Science and Engineering Division
- Air Force Office of Scientific Research
- FA9550-19-1-0358
- Defense Advanced Research Projects Agency
- Defense Advanced Research Projects Agency: D18AC00015KK1932
- JPS KAKENHI
- 21H04553
- JPS KAKENHI
- 20H00355
- European Commission
- 862721
- University of Chicago
- Research Computing Center
- Swedish Research Council Formas
- 20200544
- Knut and Alice Wallenberg foundation
- 2018.0071