41 lines
2.0 KiB
Plaintext
41 lines
2.0 KiB
Plaintext
---
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title: EvolutionBase
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description: API reference for qiskit.opflow.evolutions.EvolutionBase
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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.opflow.evolutions.EvolutionBase
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---
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# EvolutionBase
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<Class id="qiskit.opflow.evolutions.EvolutionBase" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/opflow/evolutions/evolution_base.py" signature="qiskit.opflow.evolutions.EvolutionBase" modifiers="class">
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Bases: [`ConverterBase`](qiskit.opflow.converters.ConverterBase "qiskit.opflow.converters.converter_base.ConverterBase"), [`ABC`](https://docs.python.org/3/library/abc.html#abc.ABC "(in Python v3.12)")
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Deprecated: A base for Evolution converters. Evolutions are converters which traverse an Operator tree, replacing any `EvolvedOp` e with a Schrodinger equation-style evolution `CircuitOp` equalling or approximating the matrix exponential of -i \* the Operator contained inside (e.primitive). The Evolutions are essentially implementations of Hamiltonian Simulation algorithms, including various methods for Trotterization.
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<Admonition title="Deprecated since version 0.24.0" type="danger">
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The class `qiskit.opflow.evolutions.evolution_base.EvolutionBase` is deprecated as of qiskit-terra 0.24.0. It will be removed no earlier than 3 months after the release date. For code migration guidelines, visit [https://qisk.it/opflow\_migration](https://qisk.it/opflow_migration).
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</Admonition>
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## Methods
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### convert
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<Function id="qiskit.opflow.evolutions.EvolutionBase.convert" signature="convert(operator)" modifiers="abstract">
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Traverse the operator, replacing any `EvolutionOps` with their equivalent evolution `CircuitOps`.
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> **Args:**
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>
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> operator: The Operator to convert.
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**Returns**
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The converted Operator, with `EvolutionOps` replaced by `CircuitOps`.
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**Return type**
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[*OperatorBase*](qiskit.opflow.OperatorBase "qiskit.opflow.operator_base.OperatorBase")
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</Function>
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</Class>
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