Solid-state qubits with a photonic interface is very promising for quantum networks. Color centers in silicon carbide have shown excellent optical and spin coherence, even when integrated with membranes and nano-structures. Additionally, nuclear spins coupled with electron spins can serve as long-lived quantum memories. Pioneering work in previous has realized the initialization of a single nuclear spin and demonstrated its entanglement with an electron spin. In this paper, we report the first realization of single-shot readout for a nuclear spin in SiC. We obtain a deterministic readout fidelity of 98.2% with a measurement duration of 1.13 ms. With a dual-step readout scheme, we obtain a readout fidelity as high as 99.5% with a success efficiency of 89.8%. Our work complements the experimental toolbox of harnessing both electron and nuclear spins in SiC for future quantum networks.
@article{arxiv.2401.04470,
title = {Single-Shot Readout of a Nuclear Spin in Silicon Carbide},
author = {Xiao-Yi Lai and Ren-Zhou Fang and Tao Li and Ren-Zhu Su and Jia Huang and Hao Li and Li-Xing You and Xiao-Hui Bao and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2401.04470},
year = {2025}
}