Story perspectives

Breakthrough Quantum Circuit Enhances Long-Distance Communication

11/26/2025

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Summary

Story summary

Researchers at Tsinghua University and the Shanghai Institute of Microsystem and Information Technology built a photonic circuit that converts time-bin into path-encoded qubits with fidelity above 97%.
The work addresses integration between long-distance quantum communication and on-chip processing.
They demonstrated entanglement and quantum key distribution with the converter.
The team aims to build a scalable QKD system using thin-film lithium niobate.

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Story summary

Researchers at Tsinghua University and the Shanghai Institute of Microsystem and Information Technology built a photonic circuit that converts time-bin into path-encoded qubits with fidelity above 97%.
The work addresses integration between long-distance quantum communication and on-chip processing.
They demonstrated entanglement and quantum key distribution with the converter.
The team aims to build a scalable QKD system using thin-film lithium niobate.