B Grade B
Atom Computing Ytterbium atom array: Physical qubits
256 qubits
As stated in the source: “quantum processor with 256 qubits”
Caveats
Qubit count is a capacity figure, not a quality measure. Not peer-reviewed.
- Set-up
- 256-qubit processor, with Microsoft. Processor used for the logical-qubit experiments in the same paper; layouts of 250 and 256 atoms are shown for code-block preparation.
- Method
- Standard
- Compared only with
- results in the group “gate based”
- Measured
- Not stated
- Published
- 18 November 2024
- Measured by
- Microsoft Quantum and Atom Computing
- Independent of the maker
- No
- Peer-reviewed
- No
- Repeated by others
- Not yet
Source
Fault-tolerant quantum computation with a neutral atom processor, arXiv (preprint, v3 9 Jun 2025). Preprint. DOI: 10.48550/arXiv.2411.11822
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 |
| Quantinuum H2 | 56 | gate based | 2025 | Maker | B | r-000022 |
| Google Willow | 105 | gate based | 9 Dec 2024 | Maker | B | r-000008 |
| IonQ Tempo | 100 | gate based | – | Maker | B | r-000026 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000036.