Dynamically Polarizing Spin Register of NV Centers in Diamond using Chopped Laser Pulses

Abstract

Nuclear spins nearby nitrogen-vacancy (NV) centers in diamond are excellent quantum memory for quantum computing and quantum sensing, but are difficult to be initialized due to their weak interactions with the environment. Here we propose and demonstrate a magnetic-field-independent, deterministic and highly efficient polarization scheme by introducing chopped laser pulses into the double-resonance initialization method. With this method, we demonstrate initialization of single-nuclear-spin approaching $98.1\%$ and a ${}^{14}N$-${}^{13}C$ double-nuclear-spin system approaching $96.8\%$ at room temperature. The initialization is limited by a nuclear-spin depolarization effect due to chopped laser excitation. Our approach could be extended to NV systems with more nuclear spins and would be a useful tool in future applications such as nano-MRI and single-cell NMR.

arXiv comment5 pages, 4 figures, comments are welcome

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Cited by in corpus (15)

• Calibration-Free Vector Magnetometry Using Nitrogen-Vacancy Center in Diamond Integrated with Optical Vortex Beam
• Efficient Implementation of a Quantum Algorithm in a Single Nitrogen Vacancy Center of Diamond
• Beating the Standard Quantum Limit under Ambient Conditions with Solid-State Spins
• Resonant Quantum Principal Component Analysis
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