EchoRZXWeylDecomposition

class qiskit.transpiler.passes.EchoRZXWeylDecomposition(*args, **kwargs)

Bases: TransformationPass

Rewrite two-qubit gates using the Weyl decomposition.

This transpiler pass rewrites two-qubit gates in terms of echoed cross-resonance gates according to the Weyl decomposition. A two-qubit gate will be replaced with at most six non-echoed RZXGates. Each pair of RZXGates forms an echoed RZXGate.

EchoRZXWeylDecomposition pass.

Deprecated since version 1.3

The class qiskit.transpiler.passes.optimization.echo_rzx_weyl_decomposition.EchoRZXWeylDecomposition is deprecated as of Qiskit 1.3. It will be removed in Qiskit 2.0. The entire Qiskit Pulse package is being deprecated and will be moved to the Qiskit Dynamics repository: https://github.com/qiskit-community/qiskit-dynamics . Note that once removed, qiskit.transpiler.passes.optimization.echo_rzx_weyl_decomposition.EchoRZXWeylDecomposition will have no alternative in Qiskit.

Parameters

instruction_schedule_map (InstructionScheduleMap) – the mapping from circuit Instruction names and arguments to Schedules.
target (Target) – The Target representing the target backend, if both instruction_schedule_map and target are specified then this argument will take precedence and instruction_schedule_map will be ignored.

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

name()

Name of the pass.

Return type

str

run

run(dag)

Run the EchoRZXWeylDecomposition pass on dag.

Rewrites two-qubit gates in an arbitrary circuit in terms of echoed cross-resonance gates by computing the Weyl decomposition of the corresponding unitary. Modifies the input dag.

Parameters

dag (DAGCircuit) - DAG to rewrite.

Returns

The modified dag.

Return type

DAGCircuit

Raises

TranspilerError - If the circuit cannot be rewritten.

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

PassManagerState

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