def test_qubits_2_py_h2(self):
""" qubits 2 py h2 test """
num_particles = (1, 1)
converter = QubitConverter(ParityMapper(), two_qubit_reduction=True)
converter.force_match(num_particles=num_particles)
state = HartreeFock(4, num_particles, converter)
ref = QuantumCircuit(2)
ref.x(0)
self.assertEqual(state, ref)
def test_qubits_6_py_lih(self):
""" qubits 6 py lih test """
num_particles = (1, 1)
converter = QubitConverter(ParityMapper(), two_qubit_reduction=True)
z2symmetries = Z2Symmetries(
symmetries=[Pauli('ZIZIZIZI'),
Pauli('ZZIIZZII')],
sq_paulis=[Pauli('IIIIIIXI'), Pauli('IIIIIXII')],
sq_list=[2, 3],
tapering_values=[1, 1],
)
converter.force_match(num_particles=num_particles,
z2symmetries=z2symmetries)
state = HartreeFock(10, num_particles, converter)
ref = QuantumCircuit(6)
ref.x([0, 1])
self.assertEqual(state, ref)
def test_mapping_basic(self):
""" Test mapping to qubit operator """
mapper = JordanWignerMapper()
qubit_conv = QubitConverter(mapper)
qubit_op = qubit_conv.convert(self.h2_op)
self.assertIsInstance(qubit_op, PauliSumOp)
# Note: The PauliSumOp equals, as used in the test below, use the equals of the
# SparsePauliOp which in turn uses np.allclose() to determine equality of
# coeffs. So the reference operator above will be matched on that basis so
# we don't need to worry about tiny precision changes for any reason.
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_JW)
with self.subTest('Re-use test'):
qubit_op = qubit_conv.convert(self.h2_op)
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_JW)
with self.subTest('convert_match()'):
qubit_op = qubit_conv.convert_match(self.h2_op)
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_JW)
with self.subTest('Re-use with different mapper'):
qubit_conv.mapper = ParityMapper()
qubit_op = qubit_conv.convert(self.h2_op)
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_PARITY)
with self.subTest('Set two qubit reduction - no effect without num particles'):
qubit_conv.two_qubit_reduction = True
qubit_op = qubit_conv.convert_match(self.h2_op)
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_PARITY)
with self.subTest('Force match set num particles'):
qubit_conv.force_match(self.num_particles)
qubit_op = qubit_conv.convert_match(self.h2_op)
self.assertEqual(qubit_op, TestQubitConverter.REF_H2_PARITY_2Q_REDUCED)
