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Reuse parameterless gates in Optimize1qGatesDecomposition #10986

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Reuse parameterless gates in Optimize1qGatesDecomposition #10986

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86150a7
Reuse paramterless gates in Optimize1qGatesDecomposition
mtreinish Oct 6, 2023
1acf6cc
Merge remote-tracking branch 'origin/main' into reuse-x-sx-1q-synth
mtreinish Oct 9, 2023
0d8d4b4
Fix lint
mtreinish Oct 9, 2023
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11 changes: 8 additions & 3 deletions qiskit/transpiler/passes/optimization/optimize_1q_decomposition.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,10 +51,12 @@
"ry": RYGate,
"rz": RZGate,
"r": RGate,
"sx": SXGate,
"x": XGate,
"sx": SXGate(),
"x": XGate(),
}

PARAMETER_FREE_GATE_NAMES = {"x", "sx"}


class Optimize1qGatesDecomposition(TransformationPass):
"""Optimize chains of single-qubit gates by combining them into a single gate.
Expand Down Expand Up @@ -146,7 +148,10 @@ def _gate_sequence_to_dag(self, best_synth_circuit):
out_dag.global_phase = best_synth_circuit.global_phase

for gate_name, angles in best_synth_circuit:
out_dag.apply_operation_back(NAME_MAP[gate_name](*angles), qubits, check=False)
if gate_name in PARAMETER_FREE_GATE_NAMES:
out_dag.apply_operation_back(NAME_MAP[gate_name], qubits, check=False)
else:
out_dag.apply_operation_back(NAME_MAP[gate_name](*angles), qubits, check=False)
return out_dag

def _substitution_checks(self, dag, old_run, new_circ, basis, qubit):
Expand Down