High-Dimensional Two-Photon Quantum Controlled Phase-Flip Gate
Abstract
High-dimensional quantum systems have been used to reveal interesting fundamental physics and to improve information capacity and noise resilience in quantum information processing. However, it remains a significant challenge to realize universal two-photon quantum gates in high dimensions with high success probability. Here, by considering an ion-cavity QED system, we theoretically propose, to the best of our knowledge, the first high-dimensional, deterministic and universal two-photon quantum gate. By using an optical cavity embedded with a single trapped 40Ca+ ion, we achieve a high average fidelity larger than 98% for a quantum controlled phase-flip gate in four-dimensional space, spanned by photonic spin angular momenta and orbital angular momenta. Our proposed system can be an essential building block for high-dimensional quantum information processing, and also provides a platform for studying high-dimensional cavity QED.
Cite
@article{arxiv.2404.14673,
title = {High-Dimensional Two-Photon Quantum Controlled Phase-Flip Gate},
author = {Mingyuan Chen and Jiangshan Tang and Miao Cai and Franco Nori and Keyu Xia},
journal= {arXiv preprint arXiv:2404.14673},
year = {2024}
}