Quantum coherence of a single NV center in a spin-cavity hybrid system

Jian Zhang, Shengran Lin, Junfeng Wang, Liren Lou, Wei Zhu and Guanzhong Wang ()
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Jian Zhang: Chinese Academy of Sciences, Hefei National Laboratory for Physical Science at Microscale
Shengran Lin: Chinese Academy of Sciences, Hefei National Laboratory for Physical Science at Microscale
Junfeng Wang: Sichuan University
Liren Lou: Chinese Academy of Sciences, Hefei National Laboratory for Physical Science at Microscale
Wei Zhu: Chinese Academy of Sciences, Hefei National Laboratory for Physical Science at Microscale
Guanzhong Wang: Chinese Academy of Sciences, Hefei National Laboratory for Physical Science at Microscale

The European Physical Journal B: Condensed Matter and Complex Systems, 2022, vol. 95, issue 3, 1-6

Abstract: Abstract Hybrid interfaces between photonic cavities and quantum emitters are promising physical platforms in the fields of quantum sensing, quantum metrology and quantum information processing. Light-matter interaction in these systems can be engineered into the regime of strong coupling and ultrastrong coupling. In this work we experimentally explore the coherent properties of a single solid spin in a hybrid system consisting of a nitrogen-vacancy center in nanodiamond and a metal-dielectric cavity. We statistically characterize the cavity enhancement factor of fluorescence intensity for a group of single nitrogen-vacancy centers. The fluorescence intensity of a single nitrogen-vacancy center can be enhanced in a metal-dielectric cavity with a factor about 3. We measure the relaxation time $$T_1$$ T 1 and decoherence time $$T_2$$ T 2 of nitrogen-vacancy centers and show the robustness of spin coherent properties in a cavity. This work shows the possibility of selectively controlling on the optical and spin coherence of a single nitrogen-vacancy center in a nanocavity. The spin-cavity hybrid system can be further used in applications such as quantum sensing and quantum engineering with nitrogen-vacancy centers. Graphic abstract

Date: 2022
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DOI: 10.1140/epjb/s10051-022-00317-w

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