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Radio-frequency magnetometry using a single electron spin

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arxiv 1210.1443 v2 pith:23J7RMWP submitted 2012-10-04 quant-ph cond-mat.mes-hall

Radio-frequency magnetometry using a single electron spin

M. Loretz , T. Rosskopf , C. L. Degen This is my paper
classification quant-ph cond-mat.mes-hall
keywords spinelectronfrequencymagneticmagnetometryradio-frequencysingleadjusted
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We experimentally demonstrate a simple and robust protocol for the detection of weak radio-frequency magnetic fields using a single electron spin in diamond. Our method relies on spin locking, where the Rabi frequency of the spin is adjusted to match the MHz signal frequency. In a proof-of-principle experiment we detect a 7.5 MHz magnetic probe field of 40 nT amplitude with <10 kHz spectral resolution over a T_1-limited noise floor of 0.3 nT/rtHz. Rotating-frame magnetometry may provide a direct and sensitive route to high-resolution spectroscopy of nanoscale nuclear spin signals.

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