B Grade B
Quantinuum H2: Physical qubits
56 qubits
As stated in the source: “up to 56 qubits”
Caveats
The journal page itself could not be fetched (HTTP 403); value read from the arXiv abstract page, which lists the PRX journal reference.
- Set-up
- 56-qubit configuration. H2 trapped-ion processor as used for random circuit sampling experiments
- Method
- Standard
- Compared only with
- results in the group “gate based”
- Measured
- Not stated
- Published
- 2025
- Measured by
- Quantinuum
- Independent of the maker
- No
- Peer-reviewed
- Yes
- Repeated by others
- Not yet
Source
The computational power of random quantum circuits in arbitrary geometries, Physical Review X 15, 021052 (2025) (arXiv:2406.02501). Peer-reviewed paper. DOI: 10.1103/PhysRevX.15.021052
Comparable results
| Machine | Value | Set-up | Published | Measured by | Grade | Record |
|---|---|---|---|---|---|---|
| IBM Nighthawk r2 | 120 | gate based | 31 Aug 2026 | Maker | B | r-000015 |
| Quantinuum Helios | 98 | gate based | 17 Jun 2026 | Maker | B | r-000016 |
| Google Willow | 105 | gate based | 9 Dec 2024 | Maker | B | r-000008 |
| Atom Computing Ytterbium atom array | 256 | gate based | 18 Nov 2024 | Maker | B | r-000036 |
| IonQ Tempo | 100 | gate based | – | Maker | B | r-000026 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000022.