The rise of the 4H-silicon-carbide-on-insulator (SiCOI) platform marks a promising pathway towards the realization of monolithic quantum photonic networks. However, the challenge of establishing room-temperature entangled registers on these integrated photonics platforms remains unresolved. Herein, we demonstrate the first entangled processor on the SiCOI platform. We show that both deterministic generation of single divacancy electron spins and near-unity spin initialization of a single 13C nuclear spin can be achieved on SiCOI at room temperature. Besides coherently manipulating the single nuclear spin, a maximally entangled state with a fidelity of 0.89 has been prepared on this CMOS-compatible semiconductor-integrated photonics system. This work establishes the foundation for compact and on-chip solutions within existing defect-based computing and sensing protocols, positioning the SiCOI platform as the most promising candidate for integrated monolithic quantum photonic networks.
@article{arxiv.2311.06541,
title = {Room-Temperature entangled quantum processor on integrated semiconductor photonics platform},
author = {Haibo Hu and Yu Zhou and Ailun Yi and Tongyuan Bao and Chengying Liu and Qi Luo and Yao Zhang and Zi Wang and Zhengtong Liu and Shuming Xiao and Xin Ou and Qinghai Song},
journal= {arXiv preprint arXiv:2311.06541},
year = {2024}
}