Work

High‐Rate Cross‐Channel Entanglement Swapping Between Independent On‐Chip Sources

Year: 2025

Type: article

Abstract: The emerging integrated quantum photonics is pushing forward the establishment of quantum networks. To interconnect individual chip-based quantum sources, high-performance entanglement swapping is indispensable. Here, using low-loss silicon chips with waveguide structure and frequency-offset pumps, high-rate cross-channel entanglement swapping is demonstrated. A record-high swapping rate of 207 counts per hour is obtained, and the measured swapping visibilities between each of two pairs of channels exceed 90%. The proposed cross-channel architecture allows dynamic channel switching by adjusting pump wavelengths, enabling flexible user pairing in quantum networks. This work makes a concrete benchmark for chip-based entanglement swapping and provides a viable solution for real-world quantum communication.

Source: Advanced Science

DOI: 10.1002/advs.202518802

Authors: Haoyang Wang, Huihong Yuan, Qiang Zeng, Lai Zhou, Haiqiang Ma, Zhiliang Yuan

Institutions: Beijing University of Posts and Telecommunications, Beijing Academy of Quantum Information Sciences, State Key Laboratory of Information Photonics and Optical Communications

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $6,730

Funders: National Natural Science Foundation of China, Natural Science Foundation of Beijing Municipality