期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.200402
关键词
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资金
- Baden-Wurttemberg-Stiftung
- Max Planck Society
- Deutsche Forschungsgesellschaft [FOR 1495]
- National Natural Science Foundation of China [91021005]
- National Fundamental Research Program of China [2007CB925200]
- Hong Kong RGC
- CUHK
- Australian Research Council
We study decoherence of a single nitrogen-vacancy (NV) center induced by the C-13 nuclear spin bath of diamond. By comparing Hahn-Echo experiments on single and double-quantum transitions of the NV triplet ground state we demonstrate that this bath can be tuned into two different regimes. At low magnetic fields, the nuclei behave as a quantum bath which causes decoherence by entangling with the NV central spin. At high magnetic fields, the bath behaves as a source of classical magnetic field noise, which creates decoherence by imprinting a random phase on the NV central spin.
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