A Quantum Computer Made a Time Crystal. The Name Is Only Half the Fun.
Google’s qubits settled into an unusual repeating rhythm, giving researchers a new way to explore how matter behaves.
Google Quantum AI
Develops quantum hardware and error-correction methods, while selected research partners use Willow for programmable scientific experiments.
United States · Research reviewed 7 Sept 2026Latest record: research brief 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.
Research brief 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
Initial assessment recorded
Assessment reviewed 6 Sept 2026
What it does. Where it fits.
Willow superconducting gate-model processors, with surface-code quantum-memory experiments.
Who should look closer
Understanding the experimental evidence behind quantum error correction. Research teams studying programmable quantum simulation through restricted partner access.
QubitWire’s editorial assessment of practical fit.Selected research partners
Willow is not publicly available. The May 15, 2026 early-access deadline has passed and selected applicants have been notified. Hardware use requires an approved group and authorized Google Cloud project.
Check the current access route ↗What has been demonstrated
Peer-reviewed Google research demonstrated surface-code memories whose logical error rate falls as code distance increases. Separately, a Phasecraft-led preprint reports programmable Fermi-Hubbard dynamics using 72 Willow qubits.
What remains unresolved
A better-protected logical memory does not by itself demonstrate the complete set of fault-tolerant operations needed for useful algorithms. Simulation results and memory results measure different capabilities.
The next question to watch
Can the demonstrated memory protection be extended to reliable logical operations and larger computations with the required real-time control?
A research question, not a promised milestone.QubitWire coverage
Simulation Rankings Can Mislead Quantum Decoder Selection
A preprint using Google Willow records separates predicting error rates from choosing error-correction software.
Google Uses Error Signals to Retune Willow's Quantum Controls
A reinforcement-learning experiment improves stability under injected drift and fine-tunes an already calibrated processor.
Sources & evidence
- Quantum error correction below the surface code threshold ↗Organization-originated source · 9 Dec 2024
Google Quantum AI and collaborators report below-threshold surface-code memories on Willow, including a logical memory exceeding the lifetime of its best physical qubit.
- Programmable digital quantum simulation of 2D Fermi-Hubbard dynamics using 72 superconducting qubits ↗Organization-originated source · 30 Oct 2025
Phasecraft researchers report 72-qubit Fermi-Hubbard dynamics on Willow and classical checks in tractable regimes.
- Willow Early Access Program ↗Organization-originated source · Publication date not stated
Program describes access for selected researchers, states Willow is not publicly available, and says selected applicants have been notified after a 15 May 2026 deadline.
- Access and authentication — Cirq ↗Organization-originated source · Publication date not stated
Google hardware access requires an approved group, Google Cloud project and approved users.
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