100 lines
4.8 KiB
Plaintext
100 lines
4.8 KiB
Plaintext
---
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title: Split2QUnitaries
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description: API reference for qiskit.transpiler.passes.Split2QUnitaries
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.transpiler.passes.Split2QUnitaries
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---
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# Split2QUnitaries
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<Class id="qiskit.transpiler.passes.Split2QUnitaries" isDedicatedPage={true} github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/optimization/split_2q_unitaries.py#L22-L83" signature="qiskit.transpiler.passes.Split2QUnitaries(*args, **kwargs)" modifiers="class">
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Bases: [`TransformationPass`](qiskit.transpiler.TransformationPass "qiskit.transpiler.basepasses.TransformationPass")
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Attempt to splits two-qubit gates in a [`DAGCircuit`](qiskit.dagcircuit.DAGCircuit "qiskit.dagcircuit.DAGCircuit") into two single-qubit gates
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This pass will analyze all the two qubit gates in the circuit and analyze the gate’s unitary matrix to determine if the gate is actually a product of 2 single qubit gates. In these cases the 2q gate can be simplified into two single qubit gates and this pass will perform this optimization and will replace the two qubit gate with two single qubit [`UnitaryGate`](qiskit.circuit.library.UnitaryGate "qiskit.circuit.library.UnitaryGate").
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Split2QUnitaries initializer.
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**Parameters**
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**fidelity** ([*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")) – Allowed tolerance for splitting two-qubit unitaries and gate decompositions
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## Attributes
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### is\_analysis\_pass
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<Attribute id="qiskit.transpiler.passes.Split2QUnitaries.is_analysis_pass">
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Check if the pass is an analysis pass.
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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.
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</Attribute>
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### is\_transformation\_pass
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<Attribute id="qiskit.transpiler.passes.Split2QUnitaries.is_transformation_pass">
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Check if the pass is a transformation pass.
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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).
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</Attribute>
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## Methods
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### execute
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<Function id="qiskit.transpiler.passes.Split2QUnitaries.execute" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/basepasses.py#L189-L211" signature="execute(passmanager_ir, state, callback=None)">
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Execute optimization task for input Qiskit IR.
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**Parameters**
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* **passmanager\_ir** ([*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.12)")) – Qiskit IR to optimize.
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* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – State associated with workflow execution by the pass manager itself.
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* **callback** ([*Callable*](https://docs.python.org/3/library/collections.abc.html#collections.abc.Callable "(in Python v3.12)") *| None*) – A callback function which is caller per execution of optimization task.
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**Returns**
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Optimized Qiskit IR and state of the workflow.
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**Return type**
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[tuple](https://docs.python.org/3/library/stdtypes.html#tuple "(in Python v3.12)")\[[*Any*](https://docs.python.org/3/library/typing.html#typing.Any "(in Python v3.12)"), [qiskit.passmanager.compilation\_status.PassManagerState](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")]
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</Function>
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### name
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<Function id="qiskit.transpiler.passes.Split2QUnitaries.name" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/passmanager/base_tasks.py#L68-L70" signature="name()">
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Name of the pass.
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**Return type**
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[str](https://docs.python.org/3/library/stdtypes.html#str "(in Python v3.12)")
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</Function>
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### run
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<Function id="qiskit.transpiler.passes.Split2QUnitaries.run" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/passes/optimization/split_2q_unitaries.py#L41-L83" signature="run(dag)">
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Run the Split2QUnitaries pass on dag.
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</Function>
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### update\_status
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<Function id="qiskit.transpiler.passes.Split2QUnitaries.update_status" github="https://github.com/Qiskit/qiskit/tree/stable/1.2/qiskit/transpiler/basepasses.py#L213-L221" signature="update_status(state, run_state)">
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Update workflow status.
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**Parameters**
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* **state** ([*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")) – Pass manager state to update.
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* **run\_state** (*RunState*) – Completion status of current task.
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**Returns**
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Updated pass manager state.
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**Return type**
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[*PassManagerState*](qiskit.passmanager.PassManagerState "qiskit.passmanager.compilation_status.PassManagerState")
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</Function>
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</Class>
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