RoadmapSuperconductingPromised for 2030
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Superconducting
Quantum scorecard
Google ships Willow, 105 physical qubits, announced Dec 2024. Next on its roadmap: Large-scale fault-tolerant quantum computer, 2030.
Latest activity on record: Oct 17, 2026
Published figures
Each figure names its device and links to where it was published.
Qubit count over time
5 announced devices, by announcement date. Records such as logical-qubit demonstrations are listed below, not plotted. The line traces the largest device to date.
Roadmap
Targets the vendor has published. A target is a promise, not a result.
Every milestone on record
5 entries, newest first.
| Date | Device |
|---|---|
| Dec 2024 | WillowFirst below-threshold surface-code error correction: logical error rate falls as code distance grows.105 physical qubits1 logical qubitcuratedSource — Willow |
| Feb 2023 | Sycamore (upgrade)Random-circuit-sampling advantage extended vs classical.70 physical qubitscuratedSource — Sycamore (upgrade) |
| Oct 2019 | SycamoreQuantum supremacy claim on random circuit sampling.53 physical qubitscuratedSource — Sycamore |
| Mar 2018 | Bristlecone72 physical qubitsWikipediaSource — Bristlecone |
| Jan 2017 | Google 20-qubit processor20 physical qubitsWikipediaSource — Google 20-qubit processor |
curated: from the code-reviewed milestone list, sourced to the vendor · reviewed: a news-surfaced milestone an editor published · Wikipedia: synced from Wikipedia's list of quantum processors.
Recent headlines
- Satoshi-era bitcoin faces a bigger quantum threat after Google new Willow breakthroughcoindesk.com · Oct 17, 2026
- Google Willow Processor Achieves Major Error Reduction, Potentially Increasing Quantum Risks To Bitcoin Securitycrowdfundinsider.com · Oct 17, 2026
- Quantum Breakthrough with Locomotive-Level Efficiency: Google Willow Taught to Brew Ultra-Pure Quantum Statessecuritylab.ru · Oct 16, 2026
Not on record for Google yet: a live fleet API, metriq-gym benchmarks, funding rounds.
Quantum · Timeline
Google, in order
Everything the site tracks for Google — hardware, records, advantage claims it took part in, funding and its own roadmap — newest first.
Newest on the timeline
Lanes and years
Jump to year
Promised next · 1
Roadmap targets whose year has not arrived yet, at the vendor's own date. They move into the timeline when the year passes, as shipped or as past their date.
20242 events
- HardwareSuperconducting
Google Willow
105physical qubits
First below-threshold surface-code error correction: logical error rate falls as code distance grows.
- Logical qubitsSuperconducting
Google Willow
1logical qubit
First below-threshold surface-code error correction: logical error rate falls as code distance grows.
20231 event
- HardwareSuperconducting
Google Sycamore (upgrade)
70physical qubits
Random-circuit-sampling advantage extended vs classical.
20191 event
- HardwareSuperconducting
Google Sycamore
53physical qubits
Quantum supremacy claim on random circuit sampling.
20181 event
- HardwareSuperconductingLane record
Google Bristlecone
72physical qubits
20171 event
- HardwareSuperconductingLane record
Google 20-qubit processor
20physical qubits
That is the whole timeline: 6 events.
Sources
What the units count
- Physical qubits
- The hardware qubits on the device, before any error correction.
- Atoms
- Neutral-atom vendors count the atoms trapped in the array; each one can act as a physical qubit.
- Algorithmic qubits (AQ)
- IonQ's own system-level metric: the widest circuit at which a fixed set of benchmark algorithms still succeeds. No other vendor publishes it.
- Logical qubits
- Error-corrected qubits, each encoded across many physical ones. The codes differ between demonstrations, so two records rarely mean the same thing.
- Quantum volume
- A system-level score (a power of two) from square random circuits. Vendors run it under their own assumptions.
- Two-qubit gate fidelity
- How often a two-qubit gate does what it should, as a percent. The cards show the best published figure, with its device and source.