Universal coherence protection in a solid-state spin qubit

doi:10.1126/science.abc5186

GSTDTAP > 气候变化

DOI	10.1126/science.abc5186
	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
	2020-09-18
发表期刊	Science
出版年	2020
英文摘要	Solid-state qubits based on the electron spin of defects in silicon carbide or diamond provide a robust and versatile architecture for developing quantum technologies. The longer the lifetime of a spin, the more manipulations and quantum calculations can be performed, making for a more powerful quantum computational platform. Miao et al. show that by dressing the spins associated with the divacancy in silicon carbide with microwave photons, the lifetime can be extended by several orders of magnitude into milliseconds (see the Perspective by Hemmer). The technique effectively creates a quiet space for the qubit, thereby protecting it from magnetic, electric, and temperature fluctuations. This approach could be applicable to other architectures and provide a universal route to protecting qubits. Science , this issue p. [1493][1]; see also p. [1432][2] 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 platform-independent components, this result suggests that substantial coherence improvements can be achieved in a wide selection of quantum architectures. [1]: /lookup/doi/10.1126/science.abc5186 [2]: /lookup/doi/10.1126/science.abe1521
领域	气候变化 ; 资源环境
URL	查看原文
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/295429
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Kevin C. Miao,Joseph P. Blanton,Christopher P. Anderson,et al. Universal coherence protection in a solid-state spin qubit[J]. Science,2020.
APA	Kevin C. Miao.,Joseph P. Blanton.,Christopher P. Anderson.,Alexandre Bourassa.,Alexander L. Crook.,...&David D. Awschalom.(2020).Universal coherence protection in a solid-state spin qubit.Science.
MLA	Kevin C. Miao,et al."Universal coherence protection in a solid-state spin qubit".Science (2020).