VibrationalStructureProblem#

class VibrationalStructureProblem(hamiltonian)[source]#

Bases: BaseProblem

Vibrational Structure Problem

The following attributes can be read and updated once the VibrationalStructureProblem object has been constructed.

properties#

a container for additional observable operator factories.

Type:: VibrationalPropertiesContainer

basis#

the second-quantization basis in which the problem's operators are expressed.

Type:: VibrationalBasis

প্যারামিটার:: hamiltonian (VibrationalEnergy) -- the Hamiltonian of this problem.

Attributes

hamiltonian#

num_modals#: The number of modals into which each mode got expanded in second-quantization.

Methods

get_default_filter_criterion()[source]#

Returns a default filter criterion method to filter the eigenvalues computed by the eigen solver. For more information see also filter_criterion().

This particular default ensures that the occupation of every mode is (close to) 1.

রিটার্ন টাইপ:: Callable[[List | ndarray, float, List[float] | None], bool] | None

get_tapered_mapper(mapper)#

Builds a TaperedQubitMapper from one of the mappers. This simplifies the identification of the Pauli operator symmetries and of the symmetry sector in which lies the solution of the problem.

প্যারামিটার:: mapper (QubitMapper) -- QubitMapper object implementing the mapping of second quantized operators to Pauli operators.
রেইজেস:: ValueError -- If the mapper is a TaperedQubitMapper.
রিটার্নস:: A TaperedQubitMapper with pre-built symmetry specifications.
রিটার্ন টাইপ:: TaperedQubitMapper

interpret(raw_result)[source]#

Interprets an EigenstateResult in the context of this problem.

প্যারামিটার:: raw_result (EigenstateResult | EigensolverResult | MinimumEigensolverResult) -- an eigenstate result object.
রিটার্নস:: A vibrational structure result.
রিটার্ন টাইপ:: VibrationalStructureResult

second_q_ops()#

Returns the second quantized operators associated with this problem.

রিটার্নস:: A tuple, with the first object being the main operator and the second being a dictionary of auxiliary operators.
রিটার্ন টাইপ:: tuple[qiskit_nature.second_q.operators.sparse_label_op.SparseLabelOp, dict[str, qiskit_nature.second_q.operators.sparse_label_op.SparseLabelOp]]