qiskit.chemistry.algorithms.ExcitedStatesEigensolver¶

class ExcitedStatesEigensolver(transformation, solver)[source]¶

The calculation of excited states via an Eigensolver algorithm

Parameters

transformation (Transformation) – Qubit Operator Transformation
solver (Union[Eigensolver, EigensolverFactory]) – Minimum Eigensolver or MESFactory object.

__init__(transformation, solver)[source]¶

Parameters

transformation (Transformation) – Qubit Operator Transformation
solver (Union[Eigensolver, EigensolverFactory]) – Minimum Eigensolver or MESFactory object.

Methods

__init__(transformation, solver)

solve(driver[, aux_operators])

Compute Ground and Excited States properties.

Attributes

`solver`	Returns the minimum eigensolver or factory.
`transformation`	Returns the transformation used to obtain a qubit operator from the molecule.

solve(driver, aux_operators=None)[source]¶

Compute Ground and Excited States properties.

Parameters

driver (BaseDriver) – a chemistry driver object which defines the chemical problem that is to be solved by this calculation.
aux_operators (Optional[List[Any]]) – Additional auxiliary operators to evaluate. Must be of type FermionicOperator if the qubit transformation is fermionic and of type BosonicOperator it is bosonic.

Raises

NotImplementedError – If an operator in aux_operators is not of type FermionicOperator.

Return type

Union[ElectronicStructureResult, VibronicStructureResult]

Returns

An eigenstate result. Depending on the transformation this can be an electronic structure or bosonic result.

property solver¶

Returns the minimum eigensolver or factory.

property transformation¶

Returns the transformation used to obtain a qubit operator from the molecule.