Universal coherence protection in a solid-state spin qubit

Kevin C. Miao, Joseph P. Blanton, Christopher P. Anderson, Alexandre Bourassa, Alexander L. Crook, Gary Wolfowicz, Hiroshi Abe, Takeshi Ohshima, David D. Awschalom

Research output: Contribution to journalArticlepeer-review


Decoherence limits the physical realization of qubits, and its mitigation is critical for the development of quantum science and technology. We construct a robust qubit embedded in a decoherence-protected subspace, obtained by applying microwave dressing to a clock transition of the ground-state electron spin of a silicon carbide divacancy defect. The qubit is universally protected from magnetic, electric, and temperature fluctuations, which account for nearly all relevant decoherence channels in the solid state. This culminates in an increase of the qubit's inhomogeneous dephasing time by more than four orders of magnitude (to >22 milliseconds), while its Hahn-echo coherence time approaches 64 milliseconds. Requiring few key platformindependent components, this result suggests that substantial coherence improvements can be achieved in a wide selection of quantum architectures.

Original languageEnglish (US)
Pages (from-to)1493-1497
Number of pages5
Issue number6509
StatePublished - Sep 2020
Externally publishedYes

ASJC Scopus subject areas

  • General


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