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Time-resolved magnetic sensing with electronic spins in diamond
A Cooper1, E Magesan1, H N Yum1
1Department of Nuclear Science and Engineering and Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Nature Communications
|January 25, 2014
Summary
Researchers developed a new quantum sensing method using nitrogen-vacancy centers in diamond to precisely measure time-varying magnetic fields. This technique reconstructs the temporal profile of unknown fields, enhancing sensitivity for nanoscale applications.
Area of Science:
- Quantum sensing
- Nanoscale physics
- Biophysics
Background:
- Quantum probes offer high sensitivity and spatial resolution for studying nanoscale phenomena.
- Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors for magnetic and electric fields.
- Existing coherent control techniques are limited for time-varying fields with unknown dynamics.
Purpose of the Study:
- To introduce a novel coherent acquisition method for accurately reconstructing time-varying fields.
- To enable sensitive measurement of fields with unknown temporal dynamics using quantum probes.
Main Methods:
- Utilized Walsh sequences as digital filters for coherent acquisition.
- Employed a single electronic spin in diamond as a quantum probe.
- Applied decoupling sequences to suppress decoherence and extract spectral coefficients.
Main Results:
- Successfully reconstructed the temporal profile of time-varying magnetic fields.
- Demonstrated improved sensitivity compared to existing quantum sensing strategies.
- Experimentally reconstructed the magnetic field radiated by a physical model of a neuron.
Conclusions:
- The developed coherent acquisition method accurately measures time-varying fields with unknown dynamics.
- This technique enhances sensitivity and opens possibilities for time-resolved nanoscale magnetic sensing.
- Results pave the way for advanced applications in biology, materials science, and physics.
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