22 lines
1.5 KiB
Plaintext
22 lines
1.5 KiB
Plaintext
---
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title: ImaginaryVariationalPrinciple
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description: API reference for qiskit.algorithms.time_evolvers.variational.ImaginaryVariationalPrinciple
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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.algorithms.time_evolvers.variational.ImaginaryVariationalPrinciple
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---
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# ImaginaryVariationalPrinciple
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<Class id="qiskit.algorithms.time_evolvers.variational.ImaginaryVariationalPrinciple" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.23/qiskit/algorithms/time_evolvers/variational/variational_principles/imaginary_variational_principle.py" signature="ImaginaryVariationalPrinciple(qgt, gradient)" modifiers="class">
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Bases: [`qiskit.algorithms.time_evolvers.variational.variational_principles.variational_principle.VariationalPrinciple`](qiskit.algorithms.time_evolvers.variational.VariationalPrinciple "qiskit.algorithms.time_evolvers.variational.variational_principles.variational_principle.VariationalPrinciple"), `abc.ABC`
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Abstract class for an Imaginary Variational Principle. The imaginary variant means that we consider imaginary time dynamics.
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**Parameters**
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* **qgt** ([`BaseQGT`](qiskit.algorithms.gradients.BaseQGT "qiskit.algorithms.gradients.base_qgt.BaseQGT")) – Instance of a class used to compute the GQT.
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* **gradient** ([`BaseEstimatorGradient`](qiskit.algorithms.gradients.BaseEstimatorGradient "qiskit.algorithms.gradients.base_estimator_gradient.BaseEstimatorGradient")) – Instance of a class used to compute the state gradient.
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</Class>
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