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Medientyp:
E-Artikel
Titel:
Five-second coherence of a single spin with single-shot readout in silicon carbide
Beteiligte:
Anderson, Christopher P.;
Glen, Elena O.;
Zeledon, Cyrus;
Bourassa, Alexandre;
Jin, Yu;
Zhu, Yizhi;
Vorwerk, Christian;
Crook, Alexander L.;
Abe, Hiroshi;
Ul-Hassan, Jawad;
Ohshima, Takeshi;
Son, Nguyen T.;
Galli, Giulia;
Awschalom, David D.
Erschienen:
American Association for the Advancement of Science (AAAS), 2022
Erschienen in:Science Advances
Sprache:
Englisch
DOI:
10.1126/sciadv.abm5912
ISSN:
2375-2548
Entstehung:
Anmerkungen:
Beschreibung:
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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
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> 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.
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