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Return the dual basis Hamiltonian as QubitOperator.

grid (Grid): The discretization to use.
geometry A list of tuples giving the coordinates of each atom. example is [('H', (0, 0, 0)), ('H', (0, 0, 0.7414))]. Distances in atomic units. Use atomic symbols to specify atoms. spinless (bool): Whether to use the spinless model or not. include_constant (bool): Whether to include the Madelung constant.

hamiltonian (QubitOperator)