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Breakthrough Photonic Router Paves Way for Quantum Internet

9/25/2025

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Summary

Story summary

Tohoku University researchers developed a photonic router that directs single and entangled photons for quantum internet, preserving polarization with over 99% fidelity and losses of 0.06 dB (1.3%).
The router operates on nanosecond timescales and integrates with existing telecoms infrastructure.
It demonstrated routing of two-photon entangled states with 97% interference visibility.
Research aims to optimize it for real-world use.

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Story summary

Tohoku University researchers developed a photonic router that directs single and entangled photons for quantum internet, preserving polarization with over 99% fidelity and losses of 0.06 dB (1.3%).
The router operates on nanosecond timescales and integrates with existing telecoms infrastructure.
It demonstrated routing of two-photon entangled states with 97% interference visibility.
Research aims to optimize it for real-world use.