C Grade C
Rigetti Computing Ankaa-3: Two-qubit gate fidelity
99.5% %
As stated in the source: “99.5% median two-qubit gate fidelity”
Caveats
Company announcement with no method or data. Search snippets of the full press release (not fetched, 403) indicate the 99.5% applies to fSim gates while the standard iSWAP gate median was 99.0%; treat 99.5% as the best gate type, not the general-purpose gate.
Not used for rankings. Grade C: announcement-level evidence is shown with a warning and never ranked.
- Set-up
- Median across the device; gate type and measurement method not stated on the fetched page.
- Method
- Standard
- Compared only with
- results in the group “median”
- Measured
- Not stated
- Published
- 23 December 2024
- Measured by
- Rigetti Computing
- Independent of the maker
- No
- Peer-reviewed
- No
- Repeated by others
- Not yet
Source
Rigetti Computing launches 84-qubit Ankaa-3 system; Achieves 99.5% median two-qubit gate fidelity milestone, Rigetti Computing. Announcement.
Comparable results
| Machine | Value | Set-up | Published | Measured by | Grade | Record |
|---|---|---|---|---|---|---|
| IQM Quantum Computers Emerald | 99.5% | median | 5 Aug 2025 | Maker | C | r-000047 |
| IonQ Forte | 99.536% | median | 7 Nov 2024 | Maker | B | r-000030 |
| IQM Quantum Computers Garnet | 99.5% | median | 22 Aug 2024 | Maker | B | r-000044 |
| Rigetti Computing Cepheus-1-108Q | 98.82% | median | – | Maker | B | r-000041 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000040.