B Grade B
IBM Nighthawk r2: Layer fidelity (error per layered gate)
2.61 × 10⁻³ error per layered gate
As stated in the source: “2Q error (layered) 2.606E-3”
Caveats
Live calibration value with no timestamp; snapshot read 27 Oct 2026 while the system showed 'Paused (maintenance)'. EPLG on a square lattice (Nighthawk) and heavy-hex (Heron) measures a 100-qubit chain on each, so the figure does not capture Nighthawk's extra connectivity. Live value from IBM's calibration table, read on 27 Oct 2026; IBM updates it regularly.
- Set-up
- ibm_phoenix. Average EPLG in a layered chain of 100 qubits, from IBM's current calibration data.
- Method
- Error per layered gate (EPLG) on a 100-qubit chain
- Compared only with
- results in the group “eplg 100 ibm”
- Measured
- Not stated
- Published
- Not stated
- Measured by
- IBM Quantum
- Independent of the maker
- No
- Peer-reviewed
- No
- Repeated by others
- Not yet
Source
IBM Quantum Platform: Compute resources (table view), IBM Quantum. Company technical document.
Comparable results
| Machine | Value | Set-up | Published | Measured by | Grade | Record |
|---|---|---|---|---|---|---|
| IBM Heron r3 | 2.69 × 10⁻³ | eplg 100 ibm | – | Maker | B | r-000010 |
| IBM Heron r2 | 3.44 × 10⁻³ | eplg 100 ibm | – | Maker | B | r-000012 |
History
- 27 October 2026: added
Spotted a mistake? Report an error, quoting r-000013.