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SUN, 1 NOV · 83 ITEMS
"Four superconducting cables link two large quantum processors into one" — Phys.org · Science & Medicine
IBM has connected two 120- superconducting quantum processors using four meter-long superconducting cables called L-couplers. The cables transfer quantum states between the processors with 99% fidelity, demonstrating a modular approach to building larger quantum computers. This is a milestone in quantum engineering, showing that separate processors can be linked without significant loss of quantum information.
The claim is well-supported by IBM's official announcement and a preprint on arXiv (2610.29986). Multiple reputable outlets (Phys.org, Science.org, The Quantum Insider) report consistent details, including the 99% fidelity and the use of Nighthawk R1 processors. The reporting sits close to the primary source, making the core claim reliable.
The research was published in October 2026, and the news broke in late October 2026, so it is genuinely new.