qml.qchem.optimize_geometry

optimize_geometry(molecule, method='rhf')

Computes the equilibrium geometry of a molecule.

Parameters:

• molecule (Molecule) – the molecule object

• method (str) – Electronic structure method used to perform geometry optimization. Available options are "rhf" and "uhf" for restricted and unrestricted Hartree-Fock, respectively. Default is "rhf".

Returns:

optimized atomic positions in Cartesian coordinates

Return type:

array[array[float]]

Example

>>> symbols  = ['H', 'F']
>>> geometry = np.array([[0.0, 0.0, 0.0],
...                      [0.0, 0.0, 1.0]])
>>> mol = qml.qchem.Molecule(symbols, geometry)
>>> eq_geom = qml.qchem.optimize_geometry(mol)
>>> eq_geom
array([[ 0.        ,  0.        , -0.40277116],
       [ 0.        ,  0.        ,  1.40277116]])

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