World-First: Quantum Computer Operated in Space Despite Setbacks
The satellite produced a clear Hong-Ou-Mandel dip, and researchers said the result could help build more robust orbital quantum hardware.
- On June 23, 2025, a University of Vienna team led by physicist Philip Walther successfully operated a quantum processor in space aboard a Falcon 9, orbiting at about 510 kilometers altitude in a global first.
- Space missions face a massive data bottleneck as satellites struggle to downlink raw information to Earth. Researchers developed on-board quantum computing to process data directly in orbit, avoiding transmission delays.
- Despite radiation from Van Allen belts and adhesive contamination that degraded optics, the team utilized Earth's shadow to conduct sensitive measurements. Every 92 minutes, the satellite passed into darkness, providing about 30 minutes per orbit to avoid solar interference.
- Researchers observed a clear Hong-Ou-Mandel dip, confirming the processor successfully manipulated non-classical interference at precisely 32.5 degrees Celsius. This matched Earth-based experiments and validated quantum behavior in orbit despite technical setbacks.
- While technical issues hampered performance, the experiment provides a critical test for future orbital quantum designs. The team reported results in a 2026 paper, outlining deployment of quantum computation at scale across distributed space networks.
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World-first: Quantum computer operated in space despite setbacks
Scientists at the University of Vienna have achieved a global first after operating a quantum computer in space. The computer was launched on a Falcon 9 rocket in June 2025. It could only be operated after much tribulation, showcasing the challenges of operating new technologies in the harsh environments of space. The idea to launch a quantum computer to space was also a response to another challenge being faced in space- the data bottleneck fo…
Engineers at the University of Vienna had to overcome many problems to be able to test the quantum computer they built in space.
A quantum photonic processor travelled to low Earth orbit and produced interference between photons despite damage to their detectors and a weakened laser. The test opens up a possibility to process information on satellites, although it does not yet allow classification or compression of spatial data.
A team from the University of Vienna runs a photonic quantum processor in orbit: it generates and measures non-classical light on a small satellite. The input A quantum processor works for the first time in space: the milestone that opens quantum computing in orbit appears first on Merca2.
A compact quantum photonic processor produced, manipulated and measured non-classical light for the first time in the erdorbit. Despite radiation, sunlight and decreasing laser technology, the team observed the central two-photon interference for photonic quantum computing. The experiment shows that quantum hardware can be operated directly on satellites in principle, even if practical applications are still far away. Vienna (Austria). Satellite…
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