def test_damping_after_dephasing():
damping = damping_kraus_map(p=1 - np.exp(-.1))
dephasing = dephasing_kraus_map(p=.5 * (1 - np.exp(-.2)))
ks_ref = combine_kraus_maps(damping, dephasing)
ks_actual = damping_after_dephasing(10, 10, 1)
np.testing.assert_allclose(ks_actual, ks_ref)
def amp_damp_i_gate(p=.1):
"""
Create amplitude damped Identity gate
"""
corrupted_i = append_kraus_to_gate(damping_kraus_map(p),
np.array([[1, 0], [0, 1]]))
return corrupted_i
def test_damping_after_dephasing():
damping = damping_kraus_map(p=1 - np.exp(-0.1))
dephasing = dephasing_kraus_map(p=0.5 * (1 - np.exp(-0.2)))
ks_ref = combine_kraus_maps(damping, dephasing)
ks_actual = damping_after_dephasing(20, 40 / 3.0, 2.0)
np.testing.assert_allclose(ks_actual, ks_ref)
def test_damping_after_dephasing():
damping = damping_kraus_map()
dephasing = dephasing_kraus_map()
ks_ref = combine_kraus_maps(damping, dephasing)
ks_actual = damping_after_dephasing(10, 10, 1)
np.testing.assert_allclose(ks_actual, ks_ref)
def test_combine_kraus_maps():
damping = damping_kraus_map()
dephasing = dephasing_kraus_map()
k1, k2, k3, k4 = combine_kraus_maps(damping, dephasing)
assert k1.shape == (2, 2)
assert k2.shape == (2, 2)
assert k3.shape == (2, 2)
assert k4.shape == (2, 2)
def test_tensor_kraus_maps():
damping = damping_kraus_map()
k1, k2, k3, k4 = tensor_kraus_maps(damping, damping)
assert k1.shape == (4, 4)
assert k2.shape == (4, 4)
assert k3.shape == (4, 4)
assert k4.shape == (4, 4)
np.testing.assert_allclose(k1[-1, -1], 1 - 0.1)
def test_damping_kraus_map():
p = 0.05
k1, k2 = damping_kraus_map(p=p)
assert k1[1, 1] == np.sqrt(1 - p)
assert k2[0, 1] == np.sqrt(p)
