Table 1 QHAL metadata. Table of metadata exposed when using the QHAL, the QHAL levels at which they are required and accompanying notes
Metadata | Description | Level 1 required | Level 2 required | Level 3 required | Notes |
|---|---|---|---|---|---|
NUM_QUBITS | Number of qubits available | Yes | Yes | Yes | – |
MAX_DEPTH | Maximum depth of an executable circuit | Yes | Yes | Yes | Expressed as max number of universal gates (Level 3) or native gates (levels 1-2) |
NATIVE_GATES | List of native gates | Yes | Yes | No | – |
CONNECTIVITY | Connectivity matrix of the qubits | Yes | Yes | No | Required for the correct compilation of circuits |
GATE_TIMES | Execution time of the native gates | Yes | No | No | Advanced users can also infer this metric through execution of test/benchmarking algorithms |
ERROR_RATE | Average error rate for one- and two-qubit native gates | No | No | No | Advanced users can also infer this metric through execution of test/benchmarking algorithms |