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Quantum Computing Foundations - A Briefing Note with Sources
Quantum computing fundamentals briefing - error correction, hardware architectures, computational advantage, and where the field stands - key papers, expert commentary, and lab progress from January 2023 to April 2026
- Claude Opus 4.8
- academic
- frontier
- blogs
Synthesised 2026-04-19
Full brief
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Quantum computing entered its most consequential experimental window between January 2023 and April 2026, and the defining shift was concrete: error correction moved from theory to demonstrated hardware. Google's 105-qubit Willow chip crossed the "below-threshold" barrier for the first time, meaning logical error…
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academic
25 sources
Academic & arXiv
The 2023–2026 academic literature on quantum computing is defined by three concurrent storylines: the genuine breakthrough in surface-code error correction, a fierce architectural race across hardware modalities, and an honest reckoning with the gap between…
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blogs
25 sources
Blogs & Independent Thinkers
The dominant story from blog and independent thinker coverage is a field in genuine transition - from NISQ-era skepticism to guarded optimism about fault-tolerant timelines - but with sharp internal disagreement about pace and credibility. Scott Aaronson's…
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frontier
25 sources
Frontier Lab & Model News
The period from 2023 to April 2026 was defined by a competitive race among Google, IBM, and Microsoft - the three dominant frontier lab players - to achieve credible fault-tolerant quantum computing milestones. Google Quantum AI's 105-qubit Willow chip…
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