Boeing to Demonstrate Quantum Networking in Space with Q4S Launch in 2026

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Washington: Defence giant Boeing September 10 announced plans to demonstrate quantum networking in space — a technological feat that, if successful, could help change the way the military processes data and identifies targets.

The company plans to launch the effort, dubbed Q4S, in 2026 using its own research-and development money. The experiment will demonstrate a concept called entanglement swapping — the ability to bring together, or entangle, the quantum states surrounding particles that haven’t previously interacted. The process is required to build expansive, hack-resistant networks in space.

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Boeing set out to tackle the entanglement swapping challenge in 2021 with the goal to move as quickly as possible to push quantum technology as far as it could, according to Jay Lowell, chief engineer for disruptive computing, networks and sensors. Through the demonstration, the company hopes to learn more about how to build quantum networks that could prove transformational for a number of industries, including defence.

“We chose a goal that nobody else had accomplished, and we saw no one out there trying to do this,” Lowell said.  “We knew it needed to be done to get where we want to go, which is the development of global quantum networks that connect sensors and computers around the world.”

The US government spends about $1 billion each year on quantum technology development through its National Quantum Initiative, which it established in 2018 to help maintain an edge over China.

In the last decade, China has conducted several significant experiments aimed at reaching breakthroughs in quantum networking. In 2016, the country’s Quantum Experiments at Space Scale demo showed that it was possible to establish quantum keys across long distances. In 2022, it followed up that effort with the Jinan-1 launch, generating keys at a much faster rate.

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Lowell described entanglement swapping as “more than twice as hard” as key distribution.

“From an impact perspective, these are the technologies that we need to validate are going to work in order to have the hope of building the quantum networks we want to build,” he said.

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The year long mission aims to demonstrate entanglement swapping between two sources within a single satellite. Working with its payload and technology partner, HRL Laboratories, Boeing has completed several key design reviews and will run an integrated payload test this month. The payload is slated to be delivered within a year, Lowell said.

California-based Astro Digital, which is building the satellite the payload will fly on, will start production of the spacecraft in 2025.

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