期刊
PHYSICAL REVIEW B
卷 96, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.081201
关键词
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资金
- ERC
- EU project (SIQS)
- EU project (DIADEMS)
- EU project (EQUAM)
- DFG [FOR 1482, FOR 1493, SFBTR 21]
- BMBF
- USARL/ORISE
- DARPA
- CUA
- ARL
- AFOSR
- NSF
- Volkswagen Foundation
- Russian Science Foundation [14-27-00054]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506284] Funding Source: National Science Foundation
- Russian Science Foundation [17-27-00001] Funding Source: Russian Science Foundation
A solid-state system combining a stable spin degree of freedom with an efficient optical interface is highly desirable as an element for integrated quantum-optical and quantum-information systems. We demonstrate a bright color center in diamond with excellent optical properties and controllable electronic spin states. Specifically, we carry out detailed optical spectroscopy of a germanium-vacancy (GeV) color center demonstrating optical spectral stability. Using an external magnetic field to lift the electronic spin degeneracy, we explore the spin degree of freedom as a controllable qubit. Spin polarization is achieved using optical pumping, and a spin relaxation time in excess of 20 mu s is demonstrated. We report resonant microwave control of spin transitions, and use this as a probe to measure the Autler-Townes effect in a microwave-optical double-resonance experiment. Superposition spin states were prepared using coherent population trapping, and a pure dephasing time of about 19 ns was observed at a temperature of 2.0 K.
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