iqm.qiskit_iqm.iqm_transpilation.IQMOptimizeSingleQubitGates
iqm.qiskit_iqm.iqm_transpilation.IQMOptimizeSingleQubitGates#
- class iqm.qiskit_iqm.iqm_transpilation.IQMOptimizeSingleQubitGates(*args, **kwargs)#
Bases:
qiskit.transpiler.basepasses.TransformationPassOptimize the decomposition of single-qubit gates for the IQM gate set.
This optimisation pass expects the circuit to be correctly layouted and translated to the IQM architecture and raises an error otherwise. The optimisation logic follows the steps:
Convert single-qubit gates to \(U\) gates and combine all neighbouring \(U\) gates.
Convert \(U\) gates according to \(U(\theta , \phi , \lambda) ~ RZ(\phi + \lambda) R(\theta, \pi / 2 - \lambda)\).
Commute RZ gates to the end of the circuit using the fact that RZ and CZ gates commute, and \(R(\theta , \phi) RZ(\lambda) = RZ(\lambda) R(\theta, \phi - \lambda)\).
Drop RZ gates immediately before measurements, and otherwise replace them according to \(RZ(\lambda) = R(\pi, \lambda / 2) R(- \pi, 0)\).
- Parameters
drop_final_rz – Drop terminal RZ gates even if there are no measurements following them (since they do not affect the measurement results). Note that this will change the unitary propagator of the circuit.
Attributes
Methods
_validate_ops(dag)run(dag)Run a pass on the DAGCircuit.
- run(dag)#
Run a pass on the DAGCircuit. This is implemented by the pass developer.
- Parameters
dag (DAGCircuit) – the dag on which the pass is run.
- Raises
NotImplementedError – when this is left unimplemented for a pass.
- Return type