期刊
PHYSICAL REVIEW LETTERS
卷 123, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.183602
关键词
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资金
- Defense University Research Instrumentation Program (DURIP) through ARO [N00014-15-1-28461234]
- DoD NDSEG
- NSF GRFP
- Alexander von Humboldt Foundation
- NSF
- CUA
- AFOSR MURI
- ARL
- Harvard CNS, NSF Award [1541959]
Quantum networks require functional nodes consisting of stationary registers with the capability of high-fidelity quantum processing and storage, which efficiently interface with photons propagating in an optical fiber. We report a significant step towards realization of such nodes using a diamond nanocavity with an embedded silicon-vacancy (SiV) color center and a proximal nuclear spin. Specifically, we show that efficient SiV-cavity coupling (with cooperativity C > 30) provides a nearly deterministic interface between photons and the electron spin memory, featuring coherence times exceeding 1 ms. Employing coherent microwave control, we demonstrate heralded single photon storage in the long-lived spin memory as well as a universal control over a cavity-coupled two-qubit register consisting of a SiV and a proximal C-13 nuclear spin with nearly second-long coherence time, laying the groundwork for implementing quantum repeaters.
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