The field
The state of quantum computing, with receipts
Same rule as the research wing: nothing is asserted that a reader can't open. Every card carries a status — a published result is not a vendor announcement is not a roadmap is not an opinion — and the date of the underlying document. Last checked 2026-08-21.
- Verified — published result
- Vendor-reported result
- Projection — roadmap target
- Opinion — named, dated
- Estimate — with caveats
- Contested — disputed in the record
- Preprint — not yet peer-reviewed
Where the hardware actually is
- ✓ achievedBelow-threshold error correction— Google Willow (Nature, 2025); Harvard/QuEra 448-atom architecture (Nature, 2026).
- ✓ achievedLogical qubits beating physical qubits— Microsoft/Quantinuum 800× (2024); Willow memory 2.4× beyond break-even (2025); Helios (2025).
- ✗ not yetA fault-tolerant machine solving useful problems— Not achieved as of 2026-08-21. Every vendor target above is dated 2027 or later.
Hardware scoreboard
Logical qubits, fidelities, code distance — results vs roadmaps, 2023–2026.
Post-quantum cryptography
NIST's standards and deadlines, Mosca's inequality, the falling cost of breaking RSA-2048 — and what isn't at risk.
What gets solved first
Chemistry and materials by expert consensus; optimization and ML with caveats; and the problems that aren't quantum.
The timeline debate
Named people, dated quotes, both directions — weighted the way the evidence is.
Careers
A ~16,500-person specialist market: roles, employers, degrees, and thin salary data — mapped to what this site already proves.
Quantum networking
From a 1,203 km satellite link to entanglement on live Berlin telecom fiber — and the repeater ingredients still being built.
Quantum sensing
Clocks at 8 × 10⁻¹⁹ and two-minute coherence: the quantum technology that ships today.
National strategies
US reauthorization in progress, the UK's £2bn, the EU Quantum Act, and DARPA's referee program.
Open-source tooling
Qiskit 2.0, OpenQASM 3.1, CUDA-Q, Stim — what an engineer actually installs, with licenses and dates.
Open problems
BQP vs NP, quantum PCP, dequantization, the threshold theorem's assumptions, NISQ advantage — what remains unproven.