qiskit.ignis.verification.process_tomography_circuits

process_tomography_circuits(circuit, measured_qubits, prepared_qubits=None, meas_labels='Pauli', meas_basis='Pauli', prep_labels='Pauli', prep_basis='Pauli')

Return a list of quantum process tomography circuits.

This performs preparation in the minimial Pauli-basis eigenstates

• "Z_p": $|0\rangle$
• "Z_m": $|1\rangle$
• "X_p": $|+\rangle$
• "Y_m": $|+i\rangle$

on each qubit, and measurement in the Pauli-basis X, Y, Z resulting in $4^n 3^n$ circuits for an n-qubit process tomography experiment.

Parameters

• circuit (QuantumCircuit) – the QuantumCircuit circuit to be tomographed.
• measured_qubits (QuantumRegister) – the qubits to be measured. This can also be a list of whole QuantumRegisters or individual QuantumRegister qubit tuples.
• prepared_qubits (Optional[QuantumRegister]) – the qubits to have state preparation applied, if different from measured_qubits. If None measured_qubits will be used for prepared qubits
• meas_labels (Union[str, Tuple[str], List[Tuple[str]]]) – (default: ‘Pauli’) The measurement operator labels.
• meas_basis (Union[str, TomographyBasis]) – (default: ‘Pauli’) The measurement basis.
• prep_labels (Union[str, Tuple[str], List[Tuple[str]]]) – (default: ‘Pauli’) The preparation operator labels.
• prep_basis (Union[str, TomographyBasis]) – (default: ‘Pauli’) The preparation basis.

Return type

List[QuantumCircuit]

Returns

A list of QuantumCircuit objects containing the original circuit with state preparation circuits prepended, and measurement circuits appended.

The returned circuits are named by the preparation and measurement basis.