Robust Nuclear Spin Polarization via Ground-State Level Anti-Crossing of Boron Vacancy Defects in Hexagonal Boron Nitride

• URL: http://arxiv.org/abs/2306.15960v2
• Date: Sat, 1 Jun 2024 01:36:26 GMT
• Title: Robust Nuclear Spin Polarization via Ground-State Level Anti-Crossing of Boron Vacancy Defects in Hexagonal Boron Nitride
• Authors: Shihao Ru, Zhengzhi Jiang, Haidong Liang, Jonathan Kenny, Hongbing Cai, Xiaodan Lyu, Robert Cernansky, Feifei Zhou, Yuzhe Yang, Kenji Watanabe, Takashi Taniguch, Fuli Li, Koh Teck Seng, Xiaogang Liu, Fedor Jelezko, Andrew A. Bettiol, Weibo Gao,
• Abstract summary: Nuclear spin polarization plays a crucial role in quantum information processing and quantum sensing. We show that GSLAC-assisted nuclear polarization can be achieved with significantly lower laser power than excited-state level anti-crossing.
• Score: 6.181926071859319
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Nuclear spin polarization plays a crucial role in quantum information processing and quantum sensing. In this work, we demonstrate a robust and efficient method for nuclear spin polarization with boron vacancy ($\mathrm{V_B^-}$) defects in hexagonal boron nitride (h-BN) using ground-state level anti-crossing (GSLAC). We show that GSLAC-assisted nuclear polarization can be achieved with significantly lower laser power than excited-state level anti-crossing, making the process experimentally more viable. Furthermore, we have demonstrated direct optical readout of nuclear spins for $\mathrm{V_B^-}$ in h-BN. Our findings suggest that GSLAC is a promising technique for the precise control and manipulation of nuclear spins in $\mathrm{V_B^-}$ defects in h-BN.

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