38 lines
1.4 KiB
Plaintext
38 lines
1.4 KiB
Plaintext
---
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title: ExcitedStatesSolver
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description: API reference for qiskit.chemistry.algorithms.ExcitedStatesSolver
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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.chemistry.algorithms.ExcitedStatesSolver
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---
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# ExcitedStatesSolver
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<Class id="qiskit.chemistry.algorithms.ExcitedStatesSolver" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.9/qiskit/chemistry/algorithms/excited_states_solvers/excited_states_solver.py" signature="ExcitedStatesSolver" modifiers="class">
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Bases: `abc.ABC`
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The excited states calculation interface
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## Methods
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### solve
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<Function id="qiskit.chemistry.algorithms.ExcitedStatesSolver.solve" signature="ExcitedStatesSolver.solve(driver, aux_operators=None)" modifiers="abstract">
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Compute the excited states energies of the molecule that was supplied via the driver.
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**Parameters**
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* **driver** (`BaseDriver`) – a chemistry driver object which defines the chemical problem that is to be solved by this calculation.
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* **aux\_operators** (`Union`\[`List`\[`FermionicOperator`], `List`\[`BosonicOperator`], `None`]) – Additional auxiliary operators to evaluate. Must be of type `FermionicOperator` if the qubit transformation is fermionic and of type `BosonicOperator` it is bosonic.
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**Return type**
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`Union`\[`ElectronicStructureResult`, `VibronicStructureResult`]
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**Returns**
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an eigenstate result
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</Function>
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</Class>
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