Fix idle qubit detection to ignore barriers

Qiskit · Jul 16, 2024 · fee9569 · fee9569
1 parent 14acf91
commit fee9569
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/circuit_knitting/utils/transforms.py b/circuit_knitting/utils/transforms.py
@@ -172,6 +172,8 @@ def _partition_labels_from_circuit(
         # Determine which qubit wires are idle/unused
         idle_wires = set(range(circuit.num_qubits))
         for instruction in circuit.data:
+            if instruction.operation.name == 'barrier':
+                continue
             for q1 in instruction.qubits:
                 q1_id = circuit.find_bit(q1).index
                 idle_wires.discard(q1_id)