LitinskiTransformation
class qiskit.transpiler.passes.LitinskiTransformation(*args, **kwargs)
Bases: TransformationPass
Applies Litinski transform to a circuit.
The transform applies to a circuit containing Clifford + RZ-rotation gates (including T and Tdg), and moves Clifford gates to the end of the circuit, while changing rotation gates to multi-qubit rotations (represented using PauliEvolution gates).
The pass supports all of the Clifford gates in the list returned by get_clifford_gate_names():
["id", "x", "y", "z", "h", "s", "sdg", "sx", "sxdg", "cx", "cz", "cy", "swap","iswap", "ecr", "dcx"]
The list of supported RZ-rotations is:
["t", "tdg", "rz"]
References
[1]: Litinski. A Game of Surface Codes.
Parameters
fix_clifford – if False (non-default), the returned circuit contains only PauliEvolution gates, with the final Clifford gates omitted. Note that in this case the operators of the original and synthesized circuits will generally not be equivalent.
Attributes
is_analysis_pass
Check if the pass is an analysis pass.
If the pass is an AnalysisPass, that means that the pass can analyze the DAG and write the results of that analysis in the property set. Modifications on the DAG are not allowed by this kind of pass.
is_transformation_pass
Check if the pass is a transformation pass.
If the pass is a TransformationPass, that means that the pass can manipulate the DAG, but cannot modify the property set (but it can be read).
Methods
execute
execute(passmanager_ir, state, callback=None)
Execute optimization task for input Qiskit IR.
Parameters
- passmanager_ir (Any) – Qiskit IR to optimize.
- state (PassManagerState) – State associated with workflow execution by the pass manager itself.
- callback (Callable | None) – A callback function which is caller per execution of optimization task.
Returns
Optimized Qiskit IR and state of the workflow.
Return type
tuple[Any, qiskit.passmanager.compilation_status.PassManagerState]
name
run
run(dag)
Run the LitiskiTransformation pass on dag.
Parameters
dag (DAGCircuit) – the input DAG.
Returns
The output DAG.
Raises
TranspilerError – if the circuit contains gates not supported by the pass.
Return type
update_status
update_status(state, run_state)
Update workflow status.
Parameters
- state (PassManagerState) – Pass manager state to update.
- run_state (RunState) – Completion status of current task.
Returns
Updated pass manager state.
Return type