Identity Test of SingleNV−Centers in Diamond at Hz-Precision Level,Physical Review Letters

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Identity Test of SingleNV−Centers in Diamond at Hz-Precision Level
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-07-28 , DOI: 10.1103/physrevlett.127.053601
Tianyu Xie ₁ , Zhiyuan Zhao ₁ , Maosen Guo ₁ , Mengqi Wang ₁ , Fazhan Shi ₁ , Jiangfeng Du ₁

Affiliation

Atomiclike defects in solids are not considered to be identical owing to the imperfections of host lattice. Here, we found that even under ambient conditions, negatively charged nitrogen-vacancy (

{NV}^{-}

) centers in diamond could still manifest identical at Hz-precision level, corresponding to a

10^{- 7}

-level relative precision, while the lattice strain can destroy the identity by tens of Hz. All parameters involved in the

{NV}^{-} - {}^{14}N

Hamiltonian are determined by formulating six nuclear frequencies at 10-mHz-level precision and measuring them at Hz-level precision. The most precisely measured parameter, the

{}^{14}N

quadrupole coupling

P

, is given by

- 494 575 4.9 (8) Hz

, whose precision is improved by nearly 4 orders of magnitude compared with previous measurements. We offer an approach for performing precision measurements in solids and deepening our understandings of NV centers as well as other solid-state defects. Besides, these high-precision results imply a potential application of a robust and integrated atomiclike clock based on ensemble NV centers.

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