Quantum 2025 – wissenschaftliches Programm
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MON: Monday Contributed Sessions
MON 23: Poster Session: Fundamental Aspects and Model Systems
MON 23.54: Poster
Montag, 8. September 2025, 18:30–20:30, ZHG Foyer 1. OG
Quantum Dynamics of Spin Polarization Transfer in NV-diamond Systems Probed by In-Situ 13C NMR — •Tilen Knaflič, Mario Grüneberg, Enrique Sánchez-Ibáñez, Claudius Mullen, and Jaka Pribošek — Silicon Austria Labs, Villach, Austria
Dynamic nuclear polarization (DNP) is a powerful technique that significantly boosts nuclear spin polarization in solids, amplifying the sensitivity of nuclear magnetic resonance (NMR), which can serve as a foundation for new-generation quantum sensors. Several DNP mechanisms - such as the Overhauser effect, the solid effect and the cross effect - rely on quantum interactions between electron and nuclear spins, mediated by microwave-driven transitions and spin diffusion. These processes exploit the large thermal polarization of electron spins and efficient polarization transfer to nuclear spins, enabling quantum control over spin ensembles and enhancing signal detection in high-resolution spectroscopy and imaging.
In this work, we explore DNP in negatively charged nitrogen-vacancy (NV−) centers in diamond, a quantum system with optically addressable spin states and long coherence times. We study the field dependence of the DNP process by performing hyperpolarization and in-situ inductive NMR detection of 13C nuclei at different magnetic fields in the range between 10 mT and 1 T. Our results provide insights into the quantum dynamics of spin polarization transfer in NV-diamond systems and demonstrate the potential of DNP for enhancing NMR sensitivity across a range of magnetic field strengths.
Keywords: Dynamic nuclear polarization; Spin dynamics; quantum technologies; nuclear magnetic resonance; NV centers