Nanoscale magnetometry using a single-spin system in diamond

R. S. Said*, D. W. Berry, J. Twamley

*Corresponding author for this work

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45 Citations (Scopus)
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We propose a protocol to estimate magnetic fields using a single nitrogen-vacancy (N-V) center in diamond, where the estimate precision scales inversely with time, δB~1/T, rather than the square-root of time, δB~1/√T. The method is based on converting the task of magnetometry into phase estimation, performing quantum phase estimation on a single N-V nuclear spin using either adaptive or nonadaptive feedback control, and the recently demonstrated capability to perform single-shot readout within the N-V. We present numerical simulations to show that our method provides an estimate whose precision scales close to ~1/T (T~ the total estimation time), and moreover will give an unambiguous estimate of the static magnetic field experienced by the N-V. By combining this protocol with recent proposals for scanning magnetometry using an N-V, our protocol will provide a significant decrease in signal acquisition time while providing an unambiguous spatial map of the magnetic field.

Original languageEnglish
Article number125410
Pages (from-to)1-7
Number of pages7
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number12
Publication statusPublished - 17 Mar 2011

Bibliographical note

Said, R. S., Berry, D. W. & Twamley, J., Physical review B. Condensed matter and materials physics, Vol. 83, Issue 12, article no. 125410, 2011. Copyright 2011 by the American Physical Society. The original article can be found at


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