期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.023602
关键词
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资金
- Wolfson College Cambridge
- Army Research Laboratory Center for Distributed Quantum Information (CDQI)
- National Science Foundation Graduate Research Fellowships Program (GRFP)
- NASA Space Technology Research Fellowship
- German Research Foundation (DFG)
- STC Center for Integrated Quantum Materials (CIQM)
- NSF [1839155, DMR-1231319]
- University of Cambridge
- ERC [PHOENICS 617985]
- EPSRC Quantum Technology Hub NQIT [EP/M013243/1]
- EPSRC [EP/M013243/1] Funding Source: UKRI
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1839155] Funding Source: National Science Foundation
Solid-state quantum emitters that couple coherent optical transitions to long-lived spin qubits are essential for quantum networks. Here we report on the spin and optical properties of individual tin-vacancy (SnV) centers in diamond nanostructures. Through cryogenic magneto-optical and spin spectroscopy, we verify the inversion-symmetric electronic structure of the SnV, identify spin-conserving and spin-flipping transitions, characterize transition linewidths, measure electron spin lifetimes, and evaluate the spin dephasing time. We find that the optical transitions are consistent with the radiative lifetime limit even in nanofabricated structures. The spin lifetime is phonon limited with an exponential temperature scaling leading to T (1) > 10 ms, and the coherence time, T-2* reaches the nuclear spin-bath limit upon cooling to 2.9 K. These spin properties exceed those of other inversion-symmetric color centers for which similar values require millikelvin temperatures. With a combination of coherent optical transitions and long spin coherence without dilution refrigeration, the SnV is a promising candidate for feasable and scalable quantum networking applications.
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