Story perspectives

New Quantum Links Enable Global Networks via Satellites

11/10/2025

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Summary

Story summary

Ground-based transmitters can create entangled photon pairs and send one to a satellite, enabling strong quantum links, led by Professors Simon Devitt and Alexander Solntsev at the University of Technology Sydney.
Nighttime operations significantly improve signal fidelity, while daytime conditions hinder performance.
This uplink approach could enable global quantum networks using smaller, cost-effective satellites and powerful ground sources.
The findings were published in Physical Review Research.

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Story summary

Ground-based transmitters can create entangled photon pairs and send one to a satellite, enabling strong quantum links, led by Professors Simon Devitt and Alexander Solntsev at the University of Technology Sydney.
Nighttime operations significantly improve signal fidelity, while daytime conditions hinder performance.
This uplink approach could enable global quantum networks using smaller, cost-effective satellites and powerful ground sources.
The findings were published in Physical Review Research.