def dump(
driver_result: ElectronicStructureDriverResult,
outpath: str,
orbsym: Optional[List[str]] = None,
isym: int = 1,
) -> None:
"""Convenience method to produce an FCIDump output file.
Args:
outpath: Path to the output file.
driver_result: The ElectronicStructureDriverResult to be dumped. It is assumed that the
nuclear_repulsion_energy contains the inactive core energy in its ElectronicEnergy
property.
orbsym: A list of spatial symmetries of the orbitals.
isym: The spatial symmetry of the wave function.
"""
particle_number = cast(ParticleNumber, driver_result.get_property(ParticleNumber))
electronic_energy = cast(ElectronicEnergy, driver_result.get_property(ElectronicEnergy))
one_body_integrals = electronic_energy.get_electronic_integral(ElectronicBasis.MO, 1)
two_body_integrals = electronic_energy.get_electronic_integral(ElectronicBasis.MO, 2)
dump(
outpath,
particle_number.num_spin_orbitals // 2,
particle_number.num_alpha + particle_number.num_beta,
one_body_integrals._matrices, # type: ignore
two_body_integrals._matrices[0:3], # type: ignore
electronic_energy.nuclear_repulsion_energy,
ms2=driver_result.molecule.multiplicity - 1,
orbsym=orbsym,
isym=isym,
)
def _populate_driver_result_basis_transform(
self, driver_result: ElectronicStructureDriverResult
) -> None:
# pylint: disable=import-error
from pyscf.tools import dump_mat
mo_coeff, mo_coeff_b = self._extract_mo_data("mo_coeff", array_dimension=3)
if logger.isEnabledFor(logging.DEBUG):
# Add some more to PySCF output...
# First analyze() which prints extra information about MO energy and occupation
self._mol.stdout.write("\n")
self._calc.analyze()
# Now labelled orbitals for contributions to the MOs for s,p,d etc of each atom
self._mol.stdout.write("\n\n--- Alpha Molecular Orbitals ---\n\n")
dump_mat.dump_mo(self._mol, mo_coeff, digits=7, start=1)
if mo_coeff_b is not None:
self._mol.stdout.write("\n--- Beta Molecular Orbitals ---\n\n")
dump_mat.dump_mo(self._mol, mo_coeff_b, digits=7, start=1)
self._mol.stdout.flush()
driver_result.add_property(
ElectronicBasisTransform(
ElectronicBasis.AO,
ElectronicBasis.MO,
mo_coeff,
mo_coeff_b,
)
)
def _populate_driver_result_metadata(
self, driver_result: ElectronicStructureDriverResult
) -> None:
# pylint: disable=import-error
from pyscf import __version__ as pyscf_version
cfg = [
f"atom={self._atom}",
f"unit={self._unit.value}",
f"charge={self._charge}",
f"spin={self._spin}",
f"basis={self._basis}",
f"method={self.method.value}",
f"conv_tol={self._conv_tol}",
f"max_cycle={self._max_cycle}",
f"init_guess={self._init_guess}",
f"max_memory={self._max_memory}",
]
if self.method.value.lower() in ("rks", "roks", "uks"):
cfg.extend(
[
f"xc_functional={self._xc_functional}",
f"xcf_library={self._xcf_library}",
]
)
driver_result.add_property(DriverMetadata("PYSCF", pyscf_version, "\n".join(cfg + [""])))
def _populate_driver_result_particle_number(
self, driver_result: ElectronicStructureDriverResult) -> None:
driver_result.add_property(
ParticleNumber(
num_spin_orbitals=self._nmo * 2,
num_particles=(self._mol.nup(), self._mol.ndown()),
))
def _populate_driver_result_particle_number(
self, driver_result: ElectronicStructureDriverResult
) -> None:
mo_occ, mo_occ_b = self._extract_mo_data("mo_occ")
driver_result.add_property(
ParticleNumber(
num_spin_orbitals=self._mol.nao * 2,
num_particles=(self._mol.nelec[0], self._mol.nelec[1]),
occupation=mo_occ,
occupation_beta=mo_occ_b,
)
)
def _populate_driver_result_metadata(
self, driver_result: ElectronicStructureDriverResult) -> None:
cfg = [
f"atoms={self.atoms}",
f"units={self.units.value}",
f"charge={self.charge}",
f"multiplicity={self.multiplicity}",
f"basis={self.basis.value}",
f"method={self.method.value}",
f"tol={self._tol}",
f"maxiters={self._maxiters}",
"",
]
driver_result.add_property(
DriverMetadata("PYQUANTE", "?", "\n".join(cfg)))
def _populate_driver_result_electronic_energy(
self, driver_result: ElectronicStructureDriverResult) -> None:
# pylint: disable=import-error
from pyquante2 import onee_integrals
from pyquante2.ints.integrals import twoe_integrals
basis_transform = driver_result.get_property(ElectronicBasisTransform)
integrals = onee_integrals(self._bfs, self._mol)
hij = integrals.T + integrals.V
hijkl = twoe_integrals(self._bfs)
one_body_ao = OneBodyElectronicIntegrals(ElectronicBasis.AO,
(hij, None))
two_body_ao = TwoBodyElectronicIntegrals(
ElectronicBasis.AO,
(hijkl.transform(np.identity(self._nmo)), None, None, None),
)
one_body_mo = one_body_ao.transform_basis(basis_transform)
two_body_mo = two_body_ao.transform_basis(basis_transform)
electronic_energy = ElectronicEnergy(
[one_body_ao, two_body_ao, one_body_mo, two_body_mo],
nuclear_repulsion_energy=self._mol.nuclear_repulsion(),
reference_energy=self._calc.energy,
)
if hasattr(self._calc, "orbe"):
orbs_energy = self._calc.orbe
orbs_energy_b = None
else:
orbs_energy = self._calc.orbea
orbs_energy_b = self._calc.orbeb
orbital_energies = ((orbs_energy, orbs_energy_b)
if orbs_energy_b is not None else orbs_energy)
electronic_energy.orbital_energies = np.asarray(orbital_energies)
electronic_energy.kinetic = OneBodyElectronicIntegrals(
ElectronicBasis.AO, (integrals.T, None))
electronic_energy.overlap = OneBodyElectronicIntegrals(
ElectronicBasis.AO, (integrals.S, None))
driver_result.add_property(electronic_energy)
def _populate_driver_result_basis_transform(
self, driver_result: ElectronicStructureDriverResult) -> None:
if hasattr(self._calc, "orbs"):
mo_coeff = self._calc.orbs
mo_coeff_b = None
else:
mo_coeff = self._calc.orbsa
mo_coeff_b = self._calc.orbsb
self._nmo = len(mo_coeff)
driver_result.add_property(
ElectronicBasisTransform(
ElectronicBasis.AO,
ElectronicBasis.MO,
mo_coeff,
mo_coeff_b,
))
def _populate_driver_result_electronic_energy(
self, driver_result: ElectronicStructureDriverResult
) -> None:
# pylint: disable=import-error
from pyscf import gto
basis_transform = driver_result.get_property(ElectronicBasisTransform)
one_body_ao = OneBodyElectronicIntegrals(
ElectronicBasis.AO,
(self._calc.get_hcore(), None),
)
two_body_ao = TwoBodyElectronicIntegrals(
ElectronicBasis.AO,
(self._mol.intor("int2e", aosym=1), None, None, None),
)
one_body_mo = one_body_ao.transform_basis(basis_transform)
two_body_mo = two_body_ao.transform_basis(basis_transform)
electronic_energy = ElectronicEnergy(
[one_body_ao, two_body_ao, one_body_mo, two_body_mo],
nuclear_repulsion_energy=gto.mole.energy_nuc(self._mol),
reference_energy=self._calc.e_tot,
)
electronic_energy.kinetic = OneBodyElectronicIntegrals(
ElectronicBasis.AO,
(self._mol.intor_symmetric("int1e_kin"), None),
)
electronic_energy.overlap = OneBodyElectronicIntegrals(
ElectronicBasis.AO,
(self._calc.get_ovlp(), None),
)
orbs_energy, orbs_energy_b = self._extract_mo_data("mo_energy")
orbital_energies = (
(orbs_energy, orbs_energy_b) if orbs_energy_b is not None else orbs_energy
)
electronic_energy.orbital_energies = np.asarray(orbital_energies)
driver_result.add_property(electronic_energy)
def _populate_driver_result_molecule(
self, driver_result: ElectronicStructureDriverResult) -> None:
geometry: List[Tuple[str, List[float]]] = []
for atom in self._mol.atoms:
atuple = atom.atuple()
geometry.append(
(PERIODIC_TABLE[atuple[0]], [a * BOHR for a in atuple[1:]]))
driver_result.molecule = Molecule(geometry,
multiplicity=self._mol.multiplicity,
charge=self._mol.charge)
def _populate_driver_result_molecule(
self, driver_result: ElectronicStructureDriverResult
) -> None:
coords = self._mol.atom_coords(unit="Angstrom")
geometry = [(self._mol.atom_pure_symbol(i), list(xyz)) for i, xyz in enumerate(coords)]
driver_result.molecule = Molecule(
geometry,
multiplicity=self._spin + 1,
charge=self._charge,
masses=list(self._mol.atom_mass_list()),
)
def run(self) -> ElectronicStructureDriverResult:
"""Returns an ElectronicStructureDriverResult instance out of a FCIDump file."""
fcidump_data = parse(self._fcidump_input)
hij = fcidump_data.get("hij", None)
hij_b = fcidump_data.get("hij_b", None)
hijkl = fcidump_data.get("hijkl", None)
hijkl_ba = fcidump_data.get("hijkl_ba", None)
hijkl_bb = fcidump_data.get("hijkl_bb", None)
multiplicity = fcidump_data.get("MS2", 0) + 1
num_beta = (fcidump_data.get("NELEC") - (multiplicity - 1)) // 2
num_alpha = fcidump_data.get("NELEC") - num_beta
particle_number = ParticleNumber(
num_spin_orbitals=fcidump_data.get("NORB") * 2,
num_particles=(num_alpha, num_beta),
)
electronic_energy = ElectronicEnergy(
[
OneBodyElectronicIntegrals(ElectronicBasis.MO, (hij, hij_b)),
TwoBodyElectronicIntegrals(ElectronicBasis.MO, (hijkl, hijkl_ba, hijkl_bb, None)),
],
nuclear_repulsion_energy=fcidump_data.get("ecore", None),
)
driver_result = ElectronicStructureDriverResult()
driver_result.add_property(electronic_energy)
driver_result.add_property(particle_number)
return driver_result
def test_from_hdf5(self):
"""Test from_hdf5."""
with h5py.File(
self.get_resource_path(
"electronic_structure_driver_result.hdf5",
"second_q/properties/resources",
),
"r",
) as file:
for group in file.values():
prop = ElectronicStructureDriverResult.from_hdf5(group)
for inner_prop in iter(prop):
expected = self.expected.get_property(type(inner_prop))
self.assertEqual(inner_prop, expected)
def _populate_driver_result_electronic_dipole_moment(
self, driver_result: ElectronicStructureDriverResult
) -> None:
basis_transform = driver_result.get_property(ElectronicBasisTransform)
self._mol.set_common_orig((0, 0, 0))
ao_dip = self._mol.intor_symmetric("int1e_r", comp=3)
d_m = self._calc.make_rdm1(self._calc.mo_coeff, self._calc.mo_occ)
if not (isinstance(d_m, np.ndarray) and d_m.ndim == 2):
d_m = d_m[0] + d_m[1]
elec_dip = np.negative(np.einsum("xij,ji->x", ao_dip, d_m).real)
elec_dip = np.round(elec_dip, decimals=8)
nucl_dip = np.einsum("i,ix->x", self._mol.atom_charges(), self._mol.atom_coords())
nucl_dip = np.round(nucl_dip, decimals=8)
logger.info("HF Electronic dipole moment: %s", elec_dip)
logger.info("Nuclear dipole moment: %s", nucl_dip)
logger.info("Total dipole moment: %s", nucl_dip + elec_dip)
x_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (ao_dip[0], None))
y_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (ao_dip[1], None))
z_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (ao_dip[2], None))
x_dipole = DipoleMoment("x", [x_dip_ints, x_dip_ints.transform_basis(basis_transform)])
y_dipole = DipoleMoment("y", [y_dip_ints, y_dip_ints.transform_basis(basis_transform)])
z_dipole = DipoleMoment("z", [z_dip_ints, z_dip_ints.transform_basis(basis_transform)])
driver_result.add_property(
ElectronicDipoleMoment(
[x_dipole, y_dipole, z_dipole],
nuclear_dipole_moment=nucl_dip,
reverse_dipole_sign=True,
)
)
def _construct_driver_result(self) -> ElectronicStructureDriverResult:
driver_result = ElectronicStructureDriverResult()
self._populate_driver_result_molecule(driver_result)
self._populate_driver_result_metadata(driver_result)
self._populate_driver_result_basis_transform(driver_result)
self._populate_driver_result_particle_number(driver_result)
self._populate_driver_result_electronic_energy(driver_result)
# TODO: once https://github.com/Qiskit/qiskit-nature/issues/312 is fixed we can stop adding
# these properties by default.
# if not settings.dict_aux_operators:
driver_result.add_property(AngularMomentum(self._nmo * 2))
driver_result.add_property(Magnetization(self._nmo * 2))
return driver_result
def test_minimal_active_space(self):
"""Test a minimal active space manually."""
driver = HDF5Driver(hdf5_input=self.get_resource_path(
"H2_631g.hdf5", "second_q/transformers"))
driver_result = driver.run()
trafo = ActiveSpaceTransformer(num_electrons=2,
num_molecular_orbitals=2)
driver_result_reduced = trafo.transform(driver_result)
expected = ElectronicStructureDriverResult()
expected.add_property(
ElectronicEnergy(
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(np.asarray([[-1.24943841, 0.0], [0.0, -0.547816138]
]), None),
),
TwoBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([
[
[[0.652098466, 0.0], [0.0, 0.433536565]],
[[0.0, 0.0794483182], [0.0794483182, 0.0]],
],
[
[[0.0, 0.0794483182], [0.0794483182, 0.0]],
[[0.433536565, 0.0], [0.0, 0.385524695]],
],
]),
None,
None,
None,
),
),
],
energy_shift={"ActiveSpaceTransformer": 0.0},
))
expected.add_property(
ElectronicDipoleMoment([
DipoleMoment(
"x",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"y",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"z",
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([[0.69447435, -1.01418298],
[-1.01418298, 0.69447435]]),
None,
),
)
],
shift={"ActiveSpaceTransformer": 0.0},
),
]))
self.assertDriverResult(driver_result_reduced, expected)
def test_tuple_num_electrons_with_manual_orbitals(self):
"""Regression test against https://github.com/Qiskit/qiskit-nature/issues/434."""
driver = HDF5Driver(hdf5_input=self.get_resource_path(
"H2_631g.hdf5", "second_q/transformers"))
driver_result = driver.run()
trafo = ActiveSpaceTransformer(
num_electrons=(1, 1),
num_molecular_orbitals=2,
active_orbitals=[0, 1],
)
driver_result_reduced = trafo.transform(driver_result)
expected = ElectronicStructureDriverResult()
expected.add_property(
ElectronicEnergy(
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(np.asarray([[-1.24943841, 0.0], [0.0, -0.547816138]
]), None),
),
TwoBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([
[
[[0.652098466, 0.0], [0.0, 0.433536565]],
[[0.0, 0.0794483182], [0.0794483182, 0.0]],
],
[
[[0.0, 0.0794483182], [0.0794483182, 0.0]],
[[0.433536565, 0.0], [0.0, 0.385524695]],
],
]),
None,
None,
None,
),
),
],
energy_shift={"ActiveSpaceTransformer": 0.0},
))
expected.add_property(
ElectronicDipoleMoment([
DipoleMoment(
"x",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"y",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"z",
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([[0.69447435, -1.01418298],
[-1.01418298, 0.69447435]]),
None,
),
)
],
shift={"ActiveSpaceTransformer": 0.0},
),
]))
self.assertDriverResult(driver_result_reduced, expected)
def _parse_matrix_file(fname: str, useao2e: bool = False) -> ElectronicStructureDriverResult:
"""
get_driver_class is used here because the discovery routine will load all the gaussian
binary dependencies, if not loaded already. It won't work without it.
"""
try:
# add gauopen to sys.path so that binaries can be loaded
gauopen_directory = os.path.join(os.path.dirname(os.path.realpath(__file__)), "gauopen")
if gauopen_directory not in sys.path:
sys.path.insert(0, gauopen_directory)
# pylint: disable=import-outside-toplevel
from .gauopen.QCMatEl import MatEl
except ImportError as mnfe:
msg = (
(
"qcmatrixio extension not found. "
"See Gaussian driver readme to build qcmatrixio.F using f2py"
)
if mnfe.name == "qcmatrixio"
else str(mnfe)
)
logger.info(msg)
raise QiskitNatureError(msg) from mnfe
mel = MatEl(file=fname)
logger.debug("MatrixElement file:\n%s", mel)
driver_result = ElectronicStructureDriverResult()
# molecule
coords = np.reshape(mel.c, (len(mel.ian), 3))
geometry: list[tuple[str, list[float]]] = []
for atom, xyz in zip(mel.ian, coords):
geometry.append((PERIODIC_TABLE[atom], BOHR * xyz))
driver_result.molecule = Molecule(
geometry,
multiplicity=mel.multip,
charge=mel.icharg,
)
# driver metadata
driver_result.add_property(DriverMetadata("GAUSSIAN", mel.gversion, ""))
# basis transform
moc = GaussianDriver._get_matrix(mel, "ALPHA MO COEFFICIENTS")
moc_b = GaussianDriver._get_matrix(mel, "BETA MO COEFFICIENTS")
if np.array_equal(moc, moc_b):
logger.debug("ALPHA and BETA MO COEFFS identical, keeping only ALPHA")
moc_b = None
nmo = moc.shape[0]
basis_transform = ElectronicBasisTransform(
ElectronicBasis.AO, ElectronicBasis.MO, moc, moc_b
)
driver_result.add_property(basis_transform)
# particle number
num_alpha = (mel.ne + mel.multip - 1) // 2
num_beta = (mel.ne - mel.multip + 1) // 2
driver_result.add_property(
ParticleNumber(num_spin_orbitals=nmo * 2, num_particles=(num_alpha, num_beta))
)
# electronic energy
hcore = GaussianDriver._get_matrix(mel, "CORE HAMILTONIAN ALPHA")
logger.debug("CORE HAMILTONIAN ALPHA %s", hcore.shape)
hcore_b = GaussianDriver._get_matrix(mel, "CORE HAMILTONIAN BETA")
if np.array_equal(hcore, hcore_b):
# From Gaussian interfacing documentation: "The two core Hamiltonians are identical
# unless a Fermi contact perturbation has been applied."
logger.debug("CORE HAMILTONIAN ALPHA and BETA identical, keeping only ALPHA")
hcore_b = None
logger.debug(
"CORE HAMILTONIAN BETA %s",
"- Not present" if hcore_b is None else hcore_b.shape,
)
one_body_ao = OneBodyElectronicIntegrals(ElectronicBasis.AO, (hcore, hcore_b))
one_body_mo = one_body_ao.transform_basis(basis_transform)
eri = GaussianDriver._get_matrix(mel, "REGULAR 2E INTEGRALS")
logger.debug("REGULAR 2E INTEGRALS %s", eri.shape)
if moc_b is None and mel.matlist.get("BB MO 2E INTEGRALS") is not None:
# It seems that when using ROHF, where alpha and beta coeffs are
# the same, that integrals
# for BB and BA are included in the output, as well as just AA
# that would have been expected
# Using these fails to give the right answer (is ok for UHF).
# So in this case we revert to
# using 2 electron ints in atomic basis from the output and
# converting them ourselves.
useao2e = True
logger.info(
"Identical A and B coeffs but BB ints are present - using regular 2E ints instead"
)
two_body_ao = TwoBodyElectronicIntegrals(ElectronicBasis.AO, (eri, None, None, None))
two_body_mo: TwoBodyElectronicIntegrals
if useao2e:
# eri are 2-body in AO. We can convert to MO via the ElectronicBasisTransform but using
# ints in MO already, as in the else here, is better
two_body_mo = two_body_ao.transform_basis(basis_transform)
else:
# These are in MO basis but by default will be reduced in size by frozen core default so
# to use them we need to add Window=Full above when we augment the config
mohijkl = GaussianDriver._get_matrix(mel, "AA MO 2E INTEGRALS")
logger.debug("AA MO 2E INTEGRALS %s", mohijkl.shape)
mohijkl_bb = GaussianDriver._get_matrix(mel, "BB MO 2E INTEGRALS")
logger.debug(
"BB MO 2E INTEGRALS %s",
"- Not present" if mohijkl_bb is None else mohijkl_bb.shape,
)
mohijkl_ba = GaussianDriver._get_matrix(mel, "BA MO 2E INTEGRALS")
logger.debug(
"BA MO 2E INTEGRALS %s",
"- Not present" if mohijkl_ba is None else mohijkl_ba.shape,
)
two_body_mo = TwoBodyElectronicIntegrals(
ElectronicBasis.MO, (mohijkl, mohijkl_ba, mohijkl_bb, None)
)
electronic_energy = ElectronicEnergy(
[one_body_ao, two_body_ao, one_body_mo, two_body_mo],
nuclear_repulsion_energy=mel.scalar("ENUCREP"),
reference_energy=mel.scalar("ETOTAL"),
)
kinetic = GaussianDriver._get_matrix(mel, "KINETIC ENERGY")
logger.debug("KINETIC ENERGY %s", kinetic.shape)
electronic_energy.kinetic = OneBodyElectronicIntegrals(ElectronicBasis.AO, (kinetic, None))
overlap = GaussianDriver._get_matrix(mel, "OVERLAP")
logger.debug("OVERLAP %s", overlap.shape)
electronic_energy.overlap = OneBodyElectronicIntegrals(ElectronicBasis.AO, (overlap, None))
orbs_energy = GaussianDriver._get_matrix(mel, "ALPHA ORBITAL ENERGIES")
logger.debug("ORBITAL ENERGIES %s", overlap.shape)
orbs_energy_b = GaussianDriver._get_matrix(mel, "BETA ORBITAL ENERGIES")
logger.debug("BETA ORBITAL ENERGIES %s", overlap.shape)
orbital_energies = (orbs_energy, orbs_energy_b) if moc_b is not None else orbs_energy
electronic_energy.orbital_energies = np.asarray(orbital_energies)
driver_result.add_property(electronic_energy)
# dipole moment
dipints = GaussianDriver._get_matrix(mel, "DIPOLE INTEGRALS")
dipints = np.einsum("ijk->kji", dipints)
x_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (dipints[0], None))
y_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (dipints[1], None))
z_dip_ints = OneBodyElectronicIntegrals(ElectronicBasis.AO, (dipints[2], None))
x_dipole = DipoleMoment("x", [x_dip_ints, x_dip_ints.transform_basis(basis_transform)])
y_dipole = DipoleMoment("y", [y_dip_ints, y_dip_ints.transform_basis(basis_transform)])
z_dipole = DipoleMoment("z", [z_dip_ints, z_dip_ints.transform_basis(basis_transform)])
nucl_dip = np.einsum("i,ix->x", mel.ian, coords)
nucl_dip = np.round(nucl_dip, decimals=8)
driver_result.add_property(
ElectronicDipoleMoment(
[x_dipole, y_dipole, z_dipole],
nuclear_dipole_moment=nucl_dip,
reverse_dipole_sign=True,
)
)
# extra properties
# TODO: once https://github.com/Qiskit/qiskit-nature/issues/312 is fixed we can stop adding
# these properties by default.
# if not settings.dict_aux_operators:
driver_result.add_property(AngularMomentum(nmo * 2))
driver_result.add_property(Magnetization(nmo * 2))
return driver_result
def test_arbitrary_active_orbitals(self):
"""Test manual selection of active orbital indices."""
driver = HDF5Driver(hdf5_input=self.get_resource_path(
"H2_631g.hdf5", "second_q/transformers"))
driver_result = driver.run()
trafo = ActiveSpaceTransformer(num_electrons=2,
num_molecular_orbitals=2,
active_orbitals=[0, 2])
driver_result_reduced = trafo.transform(driver_result)
expected = ElectronicStructureDriverResult()
expected.add_property(
ElectronicEnergy(
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([[-1.24943841, -0.16790838],
[-0.16790838, -0.18307469]]),
None,
),
),
TwoBodyElectronicIntegrals(
ElectronicBasis.MO,
(
np.asarray([
[
[[0.65209847, 0.16790822],
[0.16790822, 0.53250905]],
[[0.16790822, 0.10962908],
[0.10962908, 0.11981429]],
],
[
[[0.16790822, 0.10962908],
[0.10962908, 0.11981429]],
[[0.53250905, 0.11981429],
[0.11981429, 0.46345617]],
],
]),
None,
None,
None,
),
),
],
energy_shift={"ActiveSpaceTransformer": 0.0},
))
expected.add_property(
ElectronicDipoleMoment([
DipoleMoment(
"x",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"y",
[
OneBodyElectronicIntegrals(ElectronicBasis.MO,
(np.zeros((2, 2)), None))
],
shift={"ActiveSpaceTransformer": 0.0},
),
DipoleMoment(
"z",
[
OneBodyElectronicIntegrals(
ElectronicBasis.MO,
(np.asarray([[0.69447435, 0.0], [0.0, 0.69447435]
]), None),
)
],
shift={"ActiveSpaceTransformer": 0.0},
),
]))
self.assertDriverResult(driver_result_reduced, expected)
def transform(
self, grouped_property: GroupedSecondQuantizedProperty
) -> GroupedElectronicProperty:
"""Reduces the given `GroupedElectronicProperty` to a given active space.
Args:
grouped_property: the `GroupedElectronicProperty` to be transformed.
Returns:
A new `GroupedElectronicProperty` instance.
Raises:
QiskitNatureError: If the provided `GroupedElectronicProperty` does not contain a
`ParticleNumber` or `ElectronicBasisTransform` instance, if more
electrons or orbitals are requested than are available, or if the
number of selected active orbital indices does not match
`num_molecular_orbitals`.
"""
if not isinstance(grouped_property, GroupedElectronicProperty):
raise QiskitNatureError(
"Only `GroupedElectronicProperty` objects can be transformed by this Transformer, "
f"not objects of type, {type(grouped_property)}.")
particle_number = grouped_property.get_property(ParticleNumber)
if particle_number is None:
raise QiskitNatureError(
"The provided `GroupedElectronicProperty` does not contain a `ParticleNumber` "
"property, which is required by this transformer!")
particle_number = cast(ParticleNumber, particle_number)
electronic_basis_transform = grouped_property.get_property(
ElectronicBasisTransform)
if electronic_basis_transform is None:
raise QiskitNatureError(
"The provided `GroupedElectronicProperty` does not contain an "
"`ElectronicBasisTransform` property, which is required by this transformer!"
)
electronic_basis_transform = cast(ElectronicBasisTransform,
electronic_basis_transform)
# get molecular orbital occupation numbers
occupation_alpha = particle_number.occupation_alpha
occupation_beta = particle_number.occupation_beta
self._mo_occ_total = occupation_alpha + occupation_beta
# determine the active space
self._active_orbs_indices, inactive_orbs_idxs = self._determine_active_space(
grouped_property)
# get molecular orbital coefficients
coeff_alpha = electronic_basis_transform.coeff_alpha
coeff_beta = electronic_basis_transform.coeff_beta
# initialize size-reducing basis transformation
self._transform_active = ElectronicBasisTransform(
ElectronicBasis.AO,
ElectronicBasis.MO,
coeff_alpha[:, self._active_orbs_indices],
coeff_beta[:, self._active_orbs_indices],
)
# compute inactive density matrix
def _inactive_density(mo_occ, mo_coeff):
return np.dot(
mo_coeff[:, inactive_orbs_idxs] * mo_occ[inactive_orbs_idxs],
np.transpose(mo_coeff[:, inactive_orbs_idxs]),
)
self._density_inactive = OneBodyElectronicIntegrals(
ElectronicBasis.AO,
(
_inactive_density(occupation_alpha, coeff_alpha),
_inactive_density(occupation_beta, coeff_beta),
),
)
# construct new GroupedElectronicProperty
grouped_property_transformed = ElectronicStructureDriverResult()
grouped_property_transformed = self._transform_property(
grouped_property) # type: ignore
grouped_property_transformed.molecule = (
grouped_property.molecule # type: ignore[attr-defined]
)
return grouped_property_transformed