def test_combine(self) -> None:
dimension = 2
t = Unitary(dimension, np.array([[1, 0], [0, np.exp(1j * np.pi / 4)]]))
t_entry = UnitarySequenceEntry(t, [0])
sequence_1 = UnitarySequence(dimension, np.repeat(t_entry, 3))
sequence_2 = UnitarySequence(
dimension,
[UnitarySequenceEntry(UnitaryDefinitions.sigmay(), [0])])
combined_sequence = UnitarySequence.combine(sequence_1, sequence_2)
assert (combined_sequence.get_length() == sequence_1.get_length() +
sequence_2.get_length())
assert combined_sequence.product().close_to(
sequence_1.product().left_multiply(sequence_2.product()))
def test_append_and_remove(self) -> None:
dimension = 2
identity = Unitary.identity(dimension)
sequence = UnitarySequence(dimension)
assert sequence.get_length() == 0
assert sequence.product().close_to(identity)
sequence.append_first(
UnitarySequenceEntry(UnitaryDefinitions.sigmax(), [0]))
assert sequence.get_length() == 1
assert sequence.product().close_to(UnitaryDefinitions.sigmax())
sequence.append_last(
UnitarySequenceEntry(UnitaryDefinitions.sigmay(), [0]))
assert sequence.get_length() == 2
assert sequence.product().close_to(UnitaryDefinitions.sigmaz())
sequence.append_first(
UnitarySequenceEntry(UnitaryDefinitions.sigmaz(), [0]))
assert sequence.get_length() == 3
assert sequence.product().close_to(identity)
sequence.remove_last()
assert sequence.get_length() == 2
assert sequence.product().close_to(UnitaryDefinitions.sigmay())
sequence.remove_first()
assert sequence.get_length() == 1
assert sequence.product().close_to(UnitaryDefinitions.sigmax())
sequence.remove_first()
assert sequence.get_length() == 0
assert sequence.product().close_to(identity)
def test_identity_roots_incorrect(self) -> None:
dimension = 2
t = Unitary(dimension, np.array([[1, 0], [0, np.exp(1j * np.pi / 4)]]))
t_entry = UnitarySequenceEntry(t, [0])
sequence = UnitarySequence(dimension, np.repeat(t_entry, 7))
assert sequence.get_dimension() == dimension
assert sequence.get_length() == 7
assert not sequence.product().close_to(np.identity(dimension))
def test_undo(self) -> None:
dimension = 2
identity = Unitary.identity(dimension)
sequence = UnitarySequence(dimension)
assert sequence.get_length() == 0
with pytest.raises(Exception):
sequence.undo()
sequence.append_first(
UnitarySequenceEntry(UnitaryDefinitions.sigmax(), [0]))
assert sequence.get_length() == 1
assert sequence.product().close_to(UnitaryDefinitions.sigmax())
sequence.undo()
assert sequence.get_length() == 0
assert sequence.product().close_to(identity)
with pytest.raises(Exception):
sequence.undo()
sequence.append_first(
UnitarySequenceEntry(UnitaryDefinitions.sigmay(), [0]))
sequence.append_first(
UnitarySequenceEntry(UnitaryDefinitions.sigmay(), [0]))
assert sequence.get_length() == 2
assert sequence.product().close_to(identity)
sequence.remove_last()
assert sequence.get_length() == 1
assert sequence.product().close_to(UnitaryDefinitions.sigmay())
sequence.undo()
assert sequence.get_length() == 2
assert sequence.product().close_to(identity)
with pytest.raises(Exception):
sequence.undo()