def test_zz_matrix():
numpy.testing.assert_allclose(ZZGate(half_turns=0).matrix(),
numpy.array([[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[0, 0, 0, 1]]),
atol=1e-8)
numpy.testing.assert_allclose(ZZGate(half_turns=0.5).matrix(),
numpy.array([[(-1j)**0.5, 0, 0, 0],
[0, 1j**0.5, 0, 0],
[0, 0, 1j**0.5, 0],
[0, 0, 0, (-1j)**0.5]]),
atol=1e-8)
numpy.testing.assert_allclose(ZZGate(half_turns=1).matrix(),
numpy.array([[-1j, 0, 0, 0],
[0, 1j, 0, 0],
[0, 0, 1j, 0],
[0, 0, 0, -1j]]),
atol=1e-8)
numpy.testing.assert_allclose(ZZGate(half_turns=-0.5).matrix(),
numpy.array([[(1j)**0.5, 0, 0, 0],
[0, (-1j)**0.5, 0, 0],
[0, 0, (-1j)**0.5, 0],
[0, 0, 0, (1j)**0.5]]),
atol=1e-8)
Z = numpy.array([[1, 0], [0, -1]])
ZZ = kron(Z, Z)
numpy.testing.assert_allclose(ZZGate(half_turns=0.25).matrix(),
expm(-1j * numpy.pi * 0.25 * ZZ / 2))
def test_zz_repr():
assert repr(ZZGate(half_turns=1)) == 'ZZ'
assert repr(ZZGate(half_turns=0.5)) == 'ZZ**0.5'
def test_zz_init_with_multiple_args_fails():
with pytest.raises(ValueError):
_ = ZZGate(half_turns=1.0, duration=numpy.pi/2)
def test_zz_eq():
eq = EqualsTester()
eq.add_equality_group(ZZGate(half_turns=3.5),
ZZGate(half_turns=-0.5),
ZZGate(rads=-0.5 * numpy.pi),
ZZGate(degs=-90),
ZZGate(duration=-numpy.pi / 4))
eq.add_equality_group(ZZGate(half_turns=2.5),
ZZGate(half_turns=0.5),
ZZGate(rads=0.5 * numpy.pi),
ZZGate(degs=90),
ZZGate(duration=0.5 * numpy.pi / 2))
eq.make_equality_group(lambda: ZZGate(half_turns=0))
eq.make_equality_group(lambda: ZZGate(half_turns=0.1))
def test_zz_init():
assert ZZGate(half_turns=0.5).half_turns == 0.5
assert ZZGate(half_turns=1.5).half_turns == -0.5
assert ZZGate(half_turns=5).half_turns == 1