What is it about?

The transparent diamond builds a clean spin-free environment, whereas the spin of impuriIties such as the Nitrogen-Vacancy could be maintained so as scientists are able to detect the spin-turbulence from the environment, for a series of basic detections, such as magnetic field, electric field, temperature etc. This paper is a demonstration of using the Excited- state lifetime of the NV center for the spin state readout and its application on magnetometry.

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Why is it important?

comparing to photoluminescence-intensity based spin-readout method, the demonstrated method provides a way to avoid certain type of noises, thus improve the long-term sensitivity.

Perspectives

Quantum sensing with the NV center fascinates scientists for its robustness among various other atomic-sized quantum platforms. Further studies aiming for higher sensitivity in the long-term measurement with this idea on nanodiamonds for bio-sensing applications, and NV ensemble for genenal magnetometry are in progress.

Yan Liu
Beijing Academy of Quantum Information Sciences

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This page is a summary of: Magnetometry based on the excited-state lifetimes of a single nitrogen-vacancy center in diamond, Applied Physics Letters, September 2021, American Institute of Physics, DOI: 10.1063/5.0070639.
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