Robust optical readout and characterization of nuclear spin transitions in nitrogen-vacancy ensembles in diamond

• URL: http://arxiv.org/abs/2001.00109v1
• Date: Tue, 31 Dec 2019 23:47:42 GMT
• Title: Robust optical readout and characterization of nuclear spin transitions in nitrogen-vacancy ensembles in diamond
• Abstract summary: Nuclear spin ensembles in diamond are promising candidates for quantum sensing applications, including rotation sensing. We perform a characterization of the optically detected nuclear-spin transitions associated with the 14N nuclear spin within diamond nitrogen vacancy (NV) centers. The temperature and magnetic field dependencies reported here are important for quantum sensing applications such as rotation sensing and potentially for applications in quantum information processing.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Nuclear spin ensembles in diamond are promising candidates for quantum sensing applications, including rotation sensing. Here we perform a characterization of the optically detected nuclear-spin transitions associated with the 14N nuclear spin within diamond nitrogen vacancy (NV) centers. We observe nuclear-spin-dependent fluorescence with the contrast of optically detected 14N nuclear Rabi oscillations comparable to that of the NV electron spin. Using Ramsey spectroscopy, we investigate the temperature and magnetic-field dependence of the nuclear spin transitions in the 77.5-420 K and 350-675 G range, respectively. The nuclear quadrupole coupling constant Q was found to vary with temperature T yielding d|Q|/dT=-35.0(2) Hz/K at T=297 K. The temperature and magnetic field dependencies reported here are important for quantum sensing applications such as rotation sensing and potentially for applications in quantum information processing.

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