QuEra’s 2026 Quantum Readiness Survey found 45% of respondents prioritize a roadmap to fault tolerance. However, there was no clear consensus on the most promising quantum computing architecture.
IBM announced a technical approach that continuously combines quantum error mitigation and quantum error correction. In a spacetime-code demonstration, it improved effective gate error rates by roughly tenfold.
A public–private collaboration using PsiQuantum’s Construct to study algorithms and scientific applications for fault-tolerant quantum computers.
Infleqtion has announced integration results for qLDPC and CUDA‑Q Logical. It built and validated a high‑rate code that uses about six physical data qubits per logical qubit.
Using NVIDIA CUDA‑Q Logical, they show a qLDPC approach can potentially maintain its low overhead on Diraq’s spin‑qubit platform.
Qblox and Riverlane demonstrated a hardware real-time QEC feedback loop from measurement readout to conditional correction. The total round-trip latency on Surface-161 was 11.886 microseconds.
IQM plans a staged deployment of a quantum computer for the LUMI AI Factory beginning in 2027, aiming to enable real-time quantum error correction and up to 9 logical qubits.
Xanadu has added Backline to PennyLane to integrate control of CPUs, GPUs, FPGAs and quantum processors from a single interface, claiming end-to-end communication latency under 3 microseconds.
Alice & Bob and Hyperion Research recommended latency testing, software standardization, and joint workflow design to integrate HPC, quantum, and AI.
The two companies have begun hardware validation of applying the STAR architecture to neutral‑atom quantum computers and of a cross‑platform cloud operations infrastructure.
Xanadu and ASML will jointly investigate lithography processes for photonic quantum hardware, aiming to suppress line-edge roughness and reduce optical loss.
IonQ has published a design and resource estimate for solving the secp256k1 elliptic-curve discrete logarithm problem on a fault‑tolerant quantum computer, estimating 19,397 physical qubits and 25.7 days per run.
To scale trapped‑ion quantum computers, the company will strengthen R&D and US domestic manufacturing of ion traps, control electronics, and optical components.
IBM has released the 120‑qubit Nighthawk r2. IBM says independent fast reset capability enables more than 100,000 circuit executions per second and reduces initialization errors.
Alice & Bob has joined the European doctoral network QuBriC, providing expertise in quantum error correction based on cat qubits.
Reports reducing physical qubit counts compared with the surface code at tested code sizes, while streamlining quantum logic operations and error correction.
Shunkai, for which Infleqtion supplied the quantum processing unit, is now operational. The initial configuration is about 50 qubits, with plans to expand to roughly 500 qubits.
Quantinuum reported $8 million in revenue for Q2 2026. While GAAP net loss widened, the company also disclosed Helios’ logical fidelity and partnerships with Oracle.
Infleqtion will join a multi-year program applying quantum computing to U.S. grid contingency analysis. Eaton will lead the effort, comparing quantum and classical approaches and estimating required resources.
D-Wave demonstrated a two-qubit entangling gate with about 99.9% fidelity and roughly 500 ns gate time. The results were published in Nature.
OptQC and NTT have signed a capital and business alliance to commercialize photonic quantum computers, expanding collaboration from R&D through commercialization and societal deployment.
Qubit counts and funding alone don’t tell the whole story. Quantum Index’s editorial team gave independent 3–5 year outlooks for 29 leading domestic and international quantum-related companies, evaluating technical feasibility, distance to commercialization, revenue, customer base, and more.
Three studies reported methods for assessing the reliability of quantum computations in regimes where classical computation cannot reproduce the answers, using space–time codes, error mitigation, and multiple quantum machines.
Alice & Bob has announced an integrated system for quantum error correction called Helium. It is designed to encode logical qubits using 18 cat qubits and to integrate with HPC environments.
Microsoft has unveiled Majorana 2, a topological quantum processor using new materials that extend qubit lifetimes by over 1,000× versus its predecessor, and aims for a scalable quantum computer by 2029.