P London, J Scheuer, JM Cai, I Schwarz, A Retzker, MB Plenio, M Katagiri, T Teraji, S Koizumi, J Isoya, R Fischer, LP McGuinness, B Naydenov, and F Jelezko. 8/5/2013. “Detecting and Polarizing Nuclear Spins with Double Resonance on a Single Electron Spin
.” Physical Review Letters, 111, 6. Publisher's Version
Abstract:We report the detection and polarization of nuclear spins in diamond at room temperature by using a single nitrogen-vacancy (NV) center. We use Hartmann-Hahn double resonance to coherently enhance the signal from a single nuclear spin while decoupling from the noisy spin bath, which otherwise limits the detection sensitivity. As a proof of principle, we (i) observe coherent oscillations between the NV center and a weakly coupled nuclear spin and (ii) demonstrate nuclear-bath cooling, which prolongs the coherence time of the NV sensor by more than a factor of 5. Our results provide a route to nanometer scale magnetic resonance imaging and novel quantum information processing protocols.