Microsoft / Quantinuum — Peer-reviewed in Nature: error correction (carbon & tesseract codes) cut logical error rates up to 800x below the underlying physical qubits on Quantinuum trapped-ion hardware - the largest physical-to-logical gap yet independently validated, with repeated mid-circuit correction across up to 12 logical qubits.
Atom Computing — Atom Computing demonstrated sustained multi-round quantum error correction with a toric code on neutral atoms — logical error rates falling as the system scales up (sub-threshold), a first for the neutral-atom platform.
Quantinuum — Quantinuum priced an upsized IPO at $60/share, raising $1.68B on Nasdaq (QNT) at a ~$15.7B market value — the quantum industry's first mega-IPO. Honeywell retains ~48% voting power.
IQM / Oak Ridge National Laboratory — A 20-qubit IQM Radiance system ("Pathfinder") went live at Oak Ridge National Laboratory on 16 Jun 2026 — Finnish superconducting maker IQM's first US installation and the first commercially-procured quantum computer at the lab. It is co-located with Frontier, the world's most powerful open-science supercomputer, for HPC–quantum integration in the National Center for Computational Sciences test bed. The deployment comes ahead of IQM's planned Nasdaq listing via a business combination with Real Asset Acquisition Corp. (RAAQ).
IonQ — IonQ launched Clavis XG Multiplex, letting quantum-key-distribution traffic run alongside classical data on existing metropolitan fiber — so operators need not redesign, isolate or dedicate optical networks for quantum security. Paired with its Clarion KX key-exchange platform, it targets the "harvest-now, decrypt-later" threat and aims to move customers from QKD pilots to production deployment.
Alice & Bob / GENCI (France) — France's HPC agency GENCI signed a public procurement (at VivaTech 2026) for an 18-cat-qubit Alice & Bob system — the world's first formal state acquisition of error-biased cat-qubit hardware, funded via France 2030's HQI (Hybrid HPC-Quantum) initiative. It will be installed at the CEA's TGCC center (Bruyères-le-Châtel) and hybridized with the Joliot-Curie supercomputer, accessible to researchers in 2027 — billed as the first early fault-tolerant QC (eFTQC) permanently sited in a European supercomputing center.
IBM / US Commerce — IBM is spinning off Anderon, a $2B (≈$1B CHIPS Act + $1B IBM) 300mm superconducting-qubit wafer fab in Albany, NY — open to other quantum vendors as a neutral 'TSMC for quantum.'
IonQ — IonQ sold its first 6th-gen, chip-based 256-qubit system (to the University of Cambridge) and posted record Q1 revenue of $64.7M (+755% YoY); its roadmap targets 10,000 networked qubits.
QuEra / Harvard / MIT — QuEra, Harvard and MIT showed qLDPC codes encoding 1,156 logical qubits into 2,304 physical (≈2:1, >50% rate), simulated into the "teraquop" regime (~1 error per trillion ops) — versus the hundreds-to-one ratio typical today.
Logical-qubit records are climbing fast, but breaking RSA-2048 needs thousands of logical (millions of physical) qubits with low error rates held for hours. Our read: real, but not imminent. (Our opinion, not investment advice.)
99.9% vs 99.99% looks like a rounding error but means 10× fewer mistakes. Error correction only pays off above a threshold near “three nines”; crossing “four nines” buys real headroom.
For decades, adding qubits added errors faster than you could correct them. “Below threshold” is the turning point where making the code bigger makes it more reliable — the precondition for a useful machine.
A 6,100-qubit array and 96 logical qubits sound contradictory until you know the difference. Physical qubits are the raw, noisy hardware; logical qubits are many physical ones error-corrected into one reliable unit. The second number is the one that matters.
QuEra / Harvard — Fault-tolerant architecture running algorithms on up to 96 logical qubits.
Quantinuum — Quantinuum launched Helios: 98 trapped-ion (barium-137) physical qubits with 99.92% two-qubit-gate fidelity and all-to-all (QCCD) connectivity, running up to 48 error-corrected logical qubits — its most accurate commercial system.
IonQ — First two-qubit gate fidelity past 99.99% — comfortable headroom over the EC threshold.
Caltech — Caltech trapped 6,100 cesium atoms in optical tweezers — roughly 10× prior arrays — holding superposition ~13 s with 99.98% single-qubit accuracy and shuttling atoms without decohering, a key enabler for error correction. Published in Nature.
Google — Errors fell as the code grew — the long-sought sign that scaling can work.
Rigetti Computing — Rigetti launched its 84-qubit Ankaa-3 superconducting system with a 99.5% median two-qubit gate fidelity — a major reliability jump from a redesigned qubit layout and Alternating-Bias Assisted Annealing, available on Rigetti's cloud and later AWS Braket / Azure.
Harvard / QuEra — First programmable logical processor running algorithms on dozens of error-corrected qubits.
Atom Computing / IBM — Atom Computing (1,180) and IBM Condor (1,121) both crossed 1,000 physical qubits.
Google — 53-qubit chip did in minutes a task framed as intractable for classical supercomputers.
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