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Phys Rev Lett. 2009 Nov 27;103(22):220802. Epub 2009 Nov 25.

Sensing of fluctuating nanoscale magnetic fields using nitrogen-vacancy centers in diamond.

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Centre for Quantum Computer Technology, School of Physics, University of Melbourne, Victoria 3010, Australia.


New magnetometry techniques based on nitrogen-vacancy (NV) defects in diamond allow for the detection of static (dc) and oscillatory (ac) nanoscopic magnetic fields, yet are limited in their ability to detect fields arising from randomly fluctuating (FC) environments. We show here that FC fields restrict dc and ac sensitivities and that probing the NV dephasing rate in a FC environment should permit the characterization of FC fields inaccessible to dc and ac techniques. FC sensitivities are shown to be comparable to those of ac magnetometry and require no additional experimental overhead or sample control.

[Indexed for MEDLINE]

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