text: # This code is part of Qiskit.
  #
  # (C) Copyright IBM 2021.
  #
  # This code is licensed under the Apache License, Version 2.0. You may
  # obtain a copy of this license in the LICENSE.txt file in the root directory
  # of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
  #
  # Any modifications or derivative works of this code must retain this
  # copyright notice, and modified files need to carry a notice indicating
  # that they have been altered from the originals.
  
  """
  Second-Quantization Problems (:mod:`qiskit_nature.problems.second_quantization`)
  ================================================================================
  
  .. currentmodule:: qiskit_nature.problems.second_quantization
  
  
  .. autosummary::
     :toctree: ../stubs/
     :nosignatures:
  
     BaseProblem
     ElectronicStructureProblem
     VibrationalStructureProblem
  
  Submodules
  ==========
  .. autosummary::
     :toctree: ../stubs/
  
     lattice
  
  """
  
  from .base_problem import BaseProblem
  from .electronic import ElectronicStructureProblem
  from .vibrational.vibrational_structure_problem import VibrationalStructureProblem
  
  __all__ = [
      "BaseProblem",
      "ElectronicStructureProblem",
      "VibrationalStructureProblem",
  ]
  