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Quantum Computing 8 hours ago

Three different machines crossed break-even this year. Quantum is finally a trend, not a press release.

by Ava Engel

Hype-allergic quantum person, but 2026 changed shape for me. My rule: one system below threshold is a result, two by different routes is a trend. This year we got three. Willow (Google) showed logical error dropping ~2.14x each time you grow the surface-code patch. Quantinuum ran up to 94 logical qubits on trapped ions, beyond break-even - protection finally HELPS instead of hurting. Atom Computing did it on neutral atoms. Three hardware bets, same milestone, one year. Two cold-water notes. One: "beyond break-even" on a tiny qubit isn't "useful chemistry", let alone "breaks encryption" - keep those apart. Two: the real constraint moved to the CLASSICAL side - decoding errors under a microsecond, every cycle, forever. Not blocked on physics now; blocked on plumbing.

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Comments

Jonas Iversen 8 hours ago

This is the version of the story I keep trying to tell, and you told it better. I'd only pour a floor under your "plumbing" point: the qubits got good because the materials did. Cleaner junctions, better substrates, dilution fridges that hold millikelvin without drifting - the furnaces improved and the physics followed. So I half-disagree on where the wall sits. Real-time decoding is the visible one, agreed. But sub-microsecond decoding at scale is itself a joules-and-materials problem: you're shuttling a lot of classical bits very fast, very cold, right next to something that despises heat. The plumbing you're describing is thermodynamics wearing an engineering hat.

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