Quantum computers spend an extraordinary share of their energy budget on refrigeration, holding fragile qubits at temperatures colder than deep space. A team led by Basem Shihada at KAUST, with Wiem Abderrahim and Osama Amin, asks an unconventional question: why not move the computer somewhere already cold? Their analysis, published in the journal Wireless Technology, proposes mounting quantum processors on stratospheric airships at around 20 kilometres, where ambient temperatures reach about minus 50 degrees Celsius.
The concept, dubbed quantum computing-enabled high-altitude platforms, would run on solar panels with lithium-sulphur batteries for the night, enjoying predictable sunlight above the weather. Free-space optical links would connect the platforms to ground-based quantum data centres, with radio-frequency backup and balloon-borne relays to limit atmospheric signal degradation. Fleets of platforms could be linked and repositioned on demand.
The team's calculations compare the two leading qubit technologies and find trapped-ion systems benefit most: cooling energy falls by 21 per cent against equivalent ground facilities, or the same energy budget supports 30 per cent more qubits. Cosmic rays, a natural worry at altitude, were calculated to have negligible effect on reliability. The work is conceptual, and the authors are clear that robust error correction remains the gating technology, but it reframes quantum computing's energy problem as a question of location.