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The eigensolver interface.
Algorithms that can compute eigenvalues for an operator may implement this interface to allow different algorithms to be used interchangeably.
abstract compute_eigenvalues(operator, aux_operators=None)
Computes the minimum eigenvalue. The
aux_operators are supplied here. While an
operator is required by algorithms,
aux_operators are optional.
- operator (BaseOperator | PauliSumOp) – Qubit operator of the observable.
- aux_operators (ListOrDict[BaseOperator | PauliSumOp] | None) – Optional list of auxiliary operators to be evaluated with the eigenstate of the minimum eigenvalue main result and their expectation values returned. For instance, in chemistry, these can be dipole operators and total particle count operators, so we can get values for these at the ground state.
An eigensolver result.
Whether computing the expectation value of auxiliary operators is supported.
If the eigensolver computes the eigenvalues of the main operator, then it can compute the expectation value of the
aux_operators for that state. Otherwise they will be ignored.
aux_operator expectations can be evaluated,