def test_bloch(self):
"""test 'bloch'
"""
qs = QState(qubit_num=3).ry(0, phase=0.25).rz(0, phase=0.25)
theta, phi = qs.bloch()
ans = (round(theta, 4) == 0.25 and round(phi, 4) == 0.25)
self.assertEqual(ans, True)
def main():
hm = Observable("x_0")
for i in range(21):
t = i * 0.05
qs = QState(1)
# time evolution
qs.evolve(observable=hm, time=t, iteration=100)
# quantum stat in bloch spere
theta, phi = qs.bloch(0)
print("time = {0:.2f}, theta = {1:.2f}*PI, phi = {2:.2f}*PI".format(
t, theta, phi))
