A roundup of recent quantum computing developments, focusing on qubit technologies and scalability challenges. Key highlights include two new papers on quantum dot approaches — one compelling enough that IBM acquired the company behind it (HRL Laboratories) — and a separate processor demonstrating 100 electrons held in diamond defects, a technology previously thought difficult to scale. The piece contextualizes these advances within the broader race to find qubit technologies that can scale to the thousands needed for complex computation.
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