def test_iqpe(self, distance): """ iqpe test """ self.log.debug('Testing End-to-End with IQPE on H2 with ' 'inter-atomic distance %s.', distance) try: driver = PySCFDriver(atom='H .0 .0 .0; H .0 .0 {}'.format(distance), unit=UnitsType.ANGSTROM, charge=0, spin=0, basis='sto3g') except QiskitChemistryError: self.skipTest('PYSCF driver does not appear to be installed') molecule = driver.run() qubit_mapping = 'parity' fer_op = FermionicOperator(h1=molecule.one_body_integrals, h2=molecule.two_body_integrals) qubit_op = fer_op.mapping(map_type=qubit_mapping, threshold=1e-10) qubit_op = Z2Symmetries.two_qubit_reduction(qubit_op, 2) exact_eigensolver = ExactEigensolver(qubit_op, k=1) results = exact_eigensolver.run() reference_energy = results['energy'] self.log.debug('The exact ground state energy is: %s', results['energy']) num_particles = molecule.num_alpha + molecule.num_beta two_qubit_reduction = True num_orbitals = qubit_op.num_qubits + (2 if two_qubit_reduction else 0) num_time_slices = 1 num_iterations = 6 state_in = HartreeFock(qubit_op.num_qubits, num_orbitals, num_particles, qubit_mapping, two_qubit_reduction) iqpe = IQPE(qubit_op, state_in, num_time_slices, num_iterations, expansion_mode='suzuki', expansion_order=2, shallow_circuit_concat=True) backend = qiskit.BasicAer.get_backend('qasm_simulator') quantum_instance = QuantumInstance(backend, shots=100) result = iqpe.run(quantum_instance) self.log.debug('top result str label: %s', result['top_measurement_label']) self.log.debug('top result in decimal: %s', result['top_measurement_decimal']) self.log.debug('stretch: %s', result['stretch']) self.log.debug('translation: %s', result['translation']) self.log.debug('final energy from QPE: %s', result['energy']) self.log.debug('reference energy: %s', reference_energy) self.log.debug('ref energy (transformed): %s', (reference_energy + result['translation']) * result['stretch']) self.log.debug('ref binary str label: %s', decimal_to_binary( (reference_energy + result['translation']) * result['stretch'], max_num_digits=num_iterations + 3, fractional_part_only=True )) np.testing.assert_approx_equal(result['energy'], reference_energy, significant=2)
def test_iqpe(self, distance): self.algorithm = 'IQPE' self.log.debug('Testing End-to-End with IQPE on H2 with ' 'inter-atomic distance {}.'.format(distance)) try: driver = PySCFDriver(atom='H .0 .0 .0; H .0 .0 {}'.format(distance), unit=UnitsType.ANGSTROM, charge=0, spin=0, basis='sto3g') except QiskitChemistryError: self.skipTest('PYSCF driver does not appear to be installed') self.molecule = driver.run() qubit_mapping = 'parity' fer_op = FermionicOperator(h1=self.molecule.one_body_integrals, h2=self.molecule.two_body_integrals) self.qubit_op = fer_op.mapping(map_type=qubit_mapping, threshold=1e-10).two_qubit_reduced_operator(2) exact_eigensolver = ExactEigensolver(self.qubit_op, k=1) results = exact_eigensolver.run() self.reference_energy = results['energy'] self.log.debug('The exact ground state energy is: {}'.format(results['energy'])) num_particles = self.molecule.num_alpha + self.molecule.num_beta two_qubit_reduction = True num_orbitals = self.qubit_op.num_qubits + (2 if two_qubit_reduction else 0) num_time_slices = 50 num_iterations = 12 state_in = HartreeFock(self.qubit_op.num_qubits, num_orbitals, num_particles, qubit_mapping, two_qubit_reduction) iqpe = IQPE(self.qubit_op, state_in, num_time_slices, num_iterations, expansion_mode='suzuki', expansion_order=2, shallow_circuit_concat=True) backend = qiskit.Aer.get_backend('qasm_simulator') run_config = RunConfig(shots=100, max_credits=10, memory=False) quantum_instance = QuantumInstance(backend, run_config, pass_manager=PassManager()) result = iqpe.run(quantum_instance) self.log.debug('top result str label: {}'.format(result['top_measurement_label'])) self.log.debug('top result in decimal: {}'.format(result['top_measurement_decimal'])) self.log.debug('stretch: {}'.format(result['stretch'])) self.log.debug('translation: {}'.format(result['translation'])) self.log.debug('final energy from QPE: {}'.format(result['energy'])) self.log.debug('reference energy: {}'.format(self.reference_energy)) self.log.debug('ref energy (transformed): {}'.format( (self.reference_energy + result['translation']) * result['stretch']) ) self.log.debug('ref binary str label: {}'.format(decimal_to_binary( (self.reference_energy + result['translation']) * result['stretch'], max_num_digits=num_iterations + 3, fractional_part_only=True ))) np.testing.assert_approx_equal(result['energy'], self.reference_energy, significant=2)