Semiconductor quantum dots, as promising solid-state platform, have exhibited deterministic photon pair generation with high polarization entanglement f\textcompwordmark idelity for quantum information applications. However, due to temporal correlation from inherently cascaded emission, photon indistinguishability is limited, which restricts their potential scalability to multi-photon experiments. Here, by utilizing quantum interferences to decouple polarization entanglement from temporal correlation, we improve multi-photon entanglement f\textcompwordmark idelity from (58.7±2.2)% to (75.5±2.0)%. Our work paves the way to realize scalable and high-quality multi-photon states from quantum dots.
@article{arxiv.2212.13126,
title = {Eliminating temporal correlation in quantum-dot entangled photon source by quantum interference},
author = {Run-Ze Liu and Yu-Kun Qiao and Han-Sen Zhong and Zhen-Xuan Ge and Hui Wang and Tung-Hsun Chung and Chao-Yang Lu and Yong-Heng Huo and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2212.13126},
year = {2023}
}