Riverlane and Rigetti Demonstrate Fast Live Error Decoding
An eight-qubit experiment reports mean decoding below one microsecond per round, with complete feedback measured separately.
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.
United Kingdom / United States · Research reviewed 7 Sept 2026Latest record: 1 evidence source added · axis ratings unchanged.
Review history 2 records
Record dates show when an assessment or clarification was saved. Review dates show the evidence check. Earlier records were recovered from QubitWire’s source history; no earlier score movement is inferred.
1 evidence source added · axis ratings unchanged
Assessment reviewed 6 Sept 2026 · Research reviewed 7 Sept 2026What changed
- Research brief
- PreviouslyNone recorded
- NowInitial technology, access and evidence brief
- Evidence source
- PreviouslyNone recorded
- Nowhttps://www.riverlane.com/deltakit
Initial assessment recorded
Assessment reviewed 6 Sept 2026
What it does. Where it fits.
Quantum error correction: real-time classical decoding and QEC development tools
Who should look closer
QEC learners, quantum hardware teams and researchers studying code, decoder and latency trade-offs.
QubitWire’s editorial assessment of practical fit.Start with open-source Deltakit
Deltakit can simulate QEC without a quantum processor and links a practical textbook. Real-time hardware decoding uses a Deltaflow integration; some Deltakit capabilities are cloud services.
Check the current access route ↗What has been demonstrated
A June 2026 journal paper reports an eight-qubit experiment on Rigetti Ankaa-2, with up to 25 decoding rounds. A separate fast-feedback measurement achieved a 9.6-microsecond response for nine measurement rounds.
What remains unresolved
This is a scoped decoding and feedback demonstration. It does not establish a universal fault-tolerant computer or sustained utility-scale operation; hardware and code quality remain essential.
The next question to watch
Can low-latency decoding remain accurate and avoid processing backlogs as larger codes and fault-tolerant logical operations run continuously?
A research question, not a promised milestone.QubitWire coverage
Sources & evidence
- Demonstrating real-time and low-latency quantum error correction with superconducting qubits ↗Organization-originated source · 1 Jun 2026
Reports integrated FPGA decoding on Rigetti Ankaa-2: eight-qubit stability experiments, up to 25 decoding rounds, sub-microsecond mean per-round decoding, and 9.6 microseconds response for nine measurement rounds.
- Deltaflow — Real-time QEC system ↗Organization-originated source · Publication date not stated
Documents Deltaflow 2 as an FPGA-based QEC system combining a hardware decoder, data routing and real-time processing connected to the control stack.
- Quantum Science Center hosts first quantum error correction workshop ↗External source (may be a collaborator) · 16 Feb 2026
ORNL's Quantum Science Center confirms a February workshop using Riverlane and IQM tools on real qubits, with participants completing surface-code experiments.
- Deltakit — Open-source QEC software ↗technical · Publication date not stated
Documents simulation without a QPU, circuit generation and analysis, links a textbook, and distinguishes open-source features from cloud services and Deltaflow real-time operation.
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