MinimumEigensolver
class MinimumEigensolver
The Minimum Eigensolver Interface.
Algorithms that can compute a minimum eigenvalue for an operator may implement this interface to allow different algorithms to be used interchangeably.
Attributes
aux_operators
abstract property
Type: Optional[List[Optional[qiskit.aqua.operators.operator_base.OperatorBase]]]
Returns the auxiliary operators.
Return type
Optional[List[Optional[OperatorBase]]]
operator
abstract property
Type: Optional[Union[qiskit.aqua.operators.operator_base.OperatorBase, qiskit.aqua.operators.legacy.base_operator.LegacyBaseOperator]]
Return the operator.
Return type
Union[OperatorBase, LegacyBaseOperator, None]
Methods
compute_minimum_eigenvalue
abstract MinimumEigensolver.compute_minimum_eigenvalue(operator=None, aux_operators=None)
Computes minimum eigenvalue. Operator and aux_operators can be supplied here and if not None will override any already set into algorithm so it can be reused with different operators. While an operator is required by algorithms, aux_operators are optional. To ‘remove’ a previous aux_operators array use an empty list here.
Parameters
- operator (
Union[OperatorBase,LegacyBaseOperator,None]) – If not None replaces operator in algorithm - aux_operators (
Optional[List[Union[OperatorBase,LegacyBaseOperator,None]]]) – If not None replaces aux_operators in algorithm
Return type
Returns
MinimumEigensolverResult
supports_aux_operators
MinimumEigensolver.supports_aux_operators()
Whether computing the expectation value of auxiliary operators is supported.
If the minimum eigensolver computes an eigenstate of the main operator then it can compute the expectation value of the aux_operators for that state. Otherwise they will be ignored.
Return type
bool
Returns
True if aux_operator expectations can be evaluated, False otherwise