Driving a dipolar NV spin ensemble at detunings hzT=4πk freezes the spin magnetization for times far beyond T2, and this freezing is used to build an ac magnetometer with 4.3 dB better sensitivity than periodic dynamical decoupling.
2 a shows the temporal evolution of ⟨ ˆSµ⟩ (µ ∈ {x, y, z}) for the first freezing point (see Extended Data Fig
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Dynamical freezing and enhanced magnetometry in an interacting spin ensemble
Driving a dipolar NV spin ensemble at detunings hzT=4πk freezes the spin magnetization for times far beyond T2, and this freezing is used to build an ac magnetometer with 4.3 dB better sensitivity than periodic dynamical decoupling.