Quantinuum Finalizes a $100 Million CHIPS Research Award
The federal agreement targets ion-trap manufacturing and optical components, not a finished fault-tolerant computer.
Quantum error correction
From fragile qubits to reliable computation.
A clear starting point
Quantum error correction encodes information across several physical qubits and uses measurements to detect errors without directly reading the encoded state. A logical qubit is the protected information, not simply another physical device.
A useful comparison asks whether increasing protection actually lowers errors, what resources it costs and which operations were demonstrated. A long-lived memory, a decoder benchmark and a complete fault-tolerant computation are different achievements.
IBM: fault-tolerant quantum computing ↗Latest coverage
TETRIS-Q Tries to Box In a Quantum Chip's Radiation Errors
A simulated chip layout uses barriers and shuffled error-correction codes to keep one radiation hit from becoming a whole-chip problem.
Simulation Rankings Can Mislead Quantum Decoder Selection
A preprint using Google Willow records separates predicting error rates from choosing error-correction software.
IonQ Preprint Tests MegaQuOp Decoding on One Laptop CPU
A simulated trapped-ion architecture kept decoding delay below 12% across three compiled workloads, but no fault-tolerant quantum computer ran the experiment.
D-Wave Demonstrates a Fast Gate for Dual-Rail Erasure Qubits
A Nature experiment reports an approximately 500-nanosecond entangling gate that largely preserves detectable photon-loss errors.
IBM Tests Built-In Checks in a 70-Logical-Qubit Sampling Experiment
The reported experiment embeds error checks in a sampling circuit and uses postselection to improve measured output quality.
Why One Logical Qubit Can Need 101 Physical Qubits
Physical qubits are the hardware. Logical qubits are error-protected systems built from them—and the conversion is never a universal ratio.
Who is working on it
Google Quantum AI
Develops quantum hardware and error-correction methods, while selected research partners use Willow for programmable scientific experiments.
Research & evidence →QC Design
Plaquette lets hardware teams compare error-correcting codes and architectures under device-specific noise, including leakage and coherent errors that simpler noise models can miss.
Research & evidence →Qedma
QESEM characterizes device noise, optimizes circuit execution and combines additional measurements with classical processing to estimate observables with uncertainty bars.
Research & evidence →Quantinuum
Provides programmable trapped-ion computers and tools for circuits with mid-circuit measurement, reset and classical feedback, alongside emulators for development.
Research & evidence →Riverlane
Builds the classical processing that interprets repeated quantum error-check measurements. Deltaflow connects decoding hardware to a quantum control system; Deltakit supplies software for designing, simulating and analyzing QEC experiments.
Research & evidence →Selected organizations relevant to this topic. Inclusion is not a ranking.
Watch & understand
Webinar: Computing with Many Encoded Logical Qubits Beyond Break Even
Quantinuum's July 7 webinar with Dr. Matthew DeCross reviews the company's own fault-tolerant experiments: better-than-physical logical fidelities, a 2:1 encoding rate and a quantum-magnetism simulation with 64 error-detected qubits. A technical company account, not independent validation—and error-detected qubits are not the same as 64 fully error-corrected logical qubits.
Watch the original video →Every Qubit Is Broken. Here's the Fix.
Learn how parity checks protect logical qubits and why IBM is exploring bivariate bicycle codes to reduce error-correction overhead.
Watch the original video →2025 IBM Quantum Roadmap update
Revisit IBM’s 2025 roadmap for Nighthawk, error correction and its planned Starling system, with future milestones presented as company targets.
Watch the original video →