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arXiv · 1607.02553

Double-quantum spin-relaxation limits to coherence of near-surface nitrogen-vacancy centers

Bryan A. Myers·Amila Ariyaratne·Ania C. Bleszynski Jayich
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Abstract

We probe the relaxation dynamics of the full three-level spin system of near-surface nitrogen-vacancy (NV) centers in diamond to define a $T_{1}$ relaxation time that helps resolve the $T_{2} \leq 2T_{1}$ coherence limit of the NV's subset qubit superpositions. We find that double-quantum spin relaxation via electric field noise dominates $T_{1}$ of near-surface NVs at low applied magnetic fields. Furthermore, we differentiate $1/f^α$ spectra of electric and magnetic field noise using a novel noise-spectroscopy technique, with broad applications in probing surface-induced decoherence at material interfaces.

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Bryan A. Myers, Amila Ariyaratne, Ania C. Bleszynski Jayich. 2016-07-08. Double-quantum spin-relaxation limits to coherence of near-surface nitrogen-vacancy centers. https://doi.org/10.1103/physrevlett.118.197201

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