期刊
PHYSICAL REVIEW X
卷 11, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.11.041041
关键词
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资金
- ERC [884745]
- EU [840393]
- EPSRC [EP/K01711X/1, EP/K017144/1, EP/N010345, EP/L016087/1]
- Gates Cambridge Trust
- Winton Programme
- General Sir John Monash Foundation
- EPSRC/NQIT
- Army Research Laboratory ENIAC Distinguished Postdoctoral Fellowship
- National Science Foundation
- NSF STC Center for Integrated Quantum Materials, NSF [DMR-1231319, 1839155]
- NSF Center for Ultracold Atoms
- NSF Center for Quantum Networks
- St. John's College Title A Fellowship
- MITRE QuantumMoonshot Program
- EPSRC [EP/K01711X/1, EP/K017144/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1839155] Funding Source: National Science Foundation
- Marie Curie Actions (MSCA) [840393] Funding Source: Marie Curie Actions (MSCA)
- European Research Council (ERC) [884745] Funding Source: European Research Council (ERC)
The study demonstrates multi-axis coherent control of the SnV spin qubit through all-optical stimulated Raman drive, confirming its coherent access and revealing spin dephasing time and spin coherence time. By integrating SnV into photonic nanostructures, it becomes a competitive spin-photon building block for quantum networks.
Group-IV color centers in diamond are a promising light-matter interface for quantum networking devices. The negatively charged tin-vacancy center (SnV) is particularly interesting, as its large spin-orbit coupling offers strong protection against phonon dephasing and robust cyclicity of its optical transitions toward spin-photon-entanglement schemes. Here, we demonstrate multiaxis coherent control of the SnV spin qubit via an all-optical stimulated Raman drive between the ground and excited states. We use coherent population trapping and optically driven electronic spin resonance to confirm coherent access to the qubit at 1.7 K and obtain spin Rabi oscillations at a rate of Omega/2 pi = 19.0(1) MHz. All-optical Ramsey interferometry reveals a spin dephasing time of T-2* = 1.3(3) mu s, and four-pulse dynamical decoupling already extends the spin-coherence time to T-2 = 0.30(8) ms. Combined with transform-limited photons and integration into photonic nanostructures, our results make the SnV a competitive spin-photon building block for quantum networks.
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