Enhancement of nuclear spin coherence times by driving dynamic nuclear polarization at defect centers in solids

Abstract

The hyperpolarization of nuclear spins can enable powerful imaging and sensing techniques provided the hyperpolarization is sufficiently long-lived. Recent experiments on nanodiamond ${}^{13}$C nuclear spins demonstrate that relaxation times can be extended by three orders of magnitude by building up dynamic nuclear polarization (DNP) through the driving of electron-nuclear flip-flop processes at defect centers. This finding raises the question of whether the nuclear spin coherence times are also impacted by this hyperpolarization process. Here, we theoretically examine the effect of DNP on the nuclear spin coherence times as a function of the hyperpolarization drive time. We do this by developing a microscopic theory of DNP in a nuclear spin ensemble coupled to microwave-driven defect centers in solids and subject to spin diffusion mediated by internuclear dipolar interactions. We find that, similarly to relaxation times, the nuclear spin coherence times can be increased substantially by a few orders of magnitude depending on the driving time. Our theoretical model and results will be useful for current and future experiments on enhancing nuclear spin coherence times via DNP.

13 pages, 11 figures. Replaced by version accepted in Phys. Rev. B

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Cited by in corpus (5)

• Decoherence of Nuclear Spins in the Proximity of Nitrogen Vacancy Centers in Diamond
• Dynamic nuclear spin polarization induced by Edelstein effect at Bi(111) surfaces
• Driven dynamics of a quantum dot electron spin coupled to bath of higher-spin nuclei
• Quantum Sensing Enhancement through a Nuclear Spin Register in Nitrogen-Vacancy Centers in Diamond
• Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles