48 lines
3.0 KiB
Plaintext
48 lines
3.0 KiB
Plaintext
---
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title: MatrixEvolution
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description: API reference for qiskit.aqua.operators.evolutions.MatrixEvolution
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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.aqua.operators.evolutions.MatrixEvolution
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---
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<span id="qiskit-aqua-operators-evolutions-matrixevolution" />
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# qiskit.aqua.operators.evolutions.MatrixEvolution
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<Class id="qiskit.aqua.operators.evolutions.MatrixEvolution" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.8/qiskit/aqua/operators/evolutions/matrix_evolution.py" signature="MatrixEvolution" modifiers="class">
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Performs Evolution by classical matrix exponentiation, constructing a circuit with `UnitaryGates` or `HamiltonianGates` containing the exponentiation of the Operator.
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### \_\_init\_\_
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<Function id="qiskit.aqua.operators.evolutions.MatrixEvolution.__init__" signature="__init__()">
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Initialize self. See help(type(self)) for accurate signature.
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</Function>
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## Methods
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| | |
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| ------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| [`__init__`](#qiskit.aqua.operators.evolutions.MatrixEvolution.__init__ "qiskit.aqua.operators.evolutions.MatrixEvolution.__init__")() | Initialize self. |
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| [`convert`](#qiskit.aqua.operators.evolutions.MatrixEvolution.convert "qiskit.aqua.operators.evolutions.MatrixEvolution.convert")(operator) | Traverse the operator, replacing `EvolvedOps` with `CircuitOps` containing `UnitaryGates` or `HamiltonianGates` (if self.coeff is a `ParameterExpression`) equalling the exponentiation of -i \* operator. |
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### convert
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<Function id="qiskit.aqua.operators.evolutions.MatrixEvolution.convert" signature="convert(operator)">
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Traverse the operator, replacing `EvolvedOps` with `CircuitOps` containing `UnitaryGates` or `HamiltonianGates` (if self.coeff is a `ParameterExpression`) equalling the exponentiation of -i \* operator. This is done by converting the `EvolvedOp.primitive` to a `MatrixOp` and simply calling `.exp_i()` on that.
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**Parameters**
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**operator** (`OperatorBase`) – The Operator to convert.
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**Return type**
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`OperatorBase`
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**Returns**
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The converted operator.
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</Function>
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</Class>
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