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Updated: Nov 1, 2025

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Published on: June 29, 2021
Low Field Nano-NMR via Three-Level System Control
J Cerrillo1, S Oviedo Casado2, J Prior1,3,4
1Área de Física Aplicada, Universidad Politécnica de Cartagena, Cartagena E-30202, Spain.
Abstract:
Conventional control strategies for nitrogen-vacancy centers in quantum sensing are based on a two-level model of their triplet ground state. However, this approach fails in regimes of weak bias magnetic fields or strong microwave pulses, as we demonstrate. To overcome this limitation, we propose a novel control sequence that exploits all three levels by addressing a hidden Raman configuration with microwave pulses tuned to the zero-field transition. We report excellent performance in typical dynamical decoupling sequences, opening up the possibility for nano-NMR operation in low field environments.
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