期刊
PHYSICAL REVIEW APPLIED
卷 13, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.13.024021
关键词
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资金
- National Natural Science Foundation of China [11874024, 11690032]
- Open Project Program of Wuhan National Laboratory for Optoelectronics [2019WNLOKF002]
- European Research Council (ERC) (QRES)
- DFG [FOR 1493, SFB TR21, SPP 1923]
- European Union via DIADEMS
- European Union via HYPERDIAMOND
- Center for Integrated Quantum Science and Technology (IQST)
- VolkswagenStiftung
- BMBF
- ERC
- European Union (DIADEMS)
- Baden-Wurttemberg Stiftung
- German Ministry of Science and Arts
- IQST
- ERC Synergy grant (BIOQ)
Because of its superior coherent and optical properties at room temperature, the nitrogen-vacancy (N-V) center in diamond has become a promising quantum probe for nanoscale quantum sensing. However, the application of N-V-containing nanodiamonds to quantum sensing suffers from their relatively short spin coherence times. Here we demonstrate energy-efficient protection of N-V spin coherence in nanodiamonds using concatenated continuous dynamical decoupling, which exhibits excellent performance with a less-stringent microwave-power requirement. When this is applied to nanodiamonds in living cells, we are able to extend the spin coherence time by an order of magnitude to the T-1 limit of 30 mu s. Further analysis demonstrates concomitant improvements of sensing performance, which shows that our results provide an important step toward in vivo quantum sensing using N-V centers in nanodiamond.
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