A Grade A
Quantinuum H1: Quantum Volume
2⁹ quantum volume
As stated in the source: “QV >= 512 (lower bound; n = 9 passed, larger not completed)”
Caveats
Measured as an external cloud user without white-box access; authors note QV results depend strongly on compilation effort and drift over time. Devices from 2022 are largely retired. Exact run dates not given.
- Set-up
- H1-2. Black-box submission of OpenQASM via Quantinuum (Honeywell) API with default compiler optimisation; n=5 at 100 shots/circuit, n=6,8,9 at 20 shots/circuit. Access: Oak Ridge National Laboratory OLCF program.
- Method
- Quantum volume protocol (heavy-output probability > 2/3, z-confidence > 0.99), independent user-side implementation
- Compared only with
- results in the group “standard”
- Measured
- Not stated
- Published
- 2022
- Measured by
- Los Alamos National Laboratory
- Independent of the maker
- Yes
- Peer-reviewed
- Yes
- Repeated by others
- Not yet
Source
Quantum Volume in Practice: What Users Can Expect from NISQ Devices, IEEE Transactions on Quantum Engineering (vol. 3, 2022, art. 3102119); preprint arXiv:2203.03816. Peer-reviewed paper. DOI: 10.1109/TQE.2022.3184764
Comparable results
| Machine | Value | Set-up | Published | Measured by | Grade | Record |
|---|---|---|---|---|---|---|
| Quantinuum H2 | 2²⁵ | standard | 3 Nov 2025 | Maker | B | r-000020 |
| IQM Quantum Computers Emerald | 2⁶ | standard | 5 Aug 2025 | Maker | C | r-000046 |
| Quantinuum H2 | 2²³ | standard | 12 May 2025 | Maker | C | r-000021 |
| IQM Quantum Computers Garnet | 32 | standard | 22 Aug 2024 | Maker | B | r-000042 |
| IonQ Harmony | 8 | standard | 2022 | Independent | A | r-000054 |
| Rigetti Computing Aspen-M-1 | 8 | standard | 2022 | Independent | A | r-000055 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000053.