def test_reset(self):
"""test 'reset'
"""
qs = QState(qubit_num=3).h(0).h(1).h(2)
qs.reset()
actual = qs.amp
expect = np.array([1j, 0j, 0j, 0j, 0j, 0j, 0j, 0j])
ans = equal_vectors(actual, expect)
self.assertEqual(ans, True)
def logical_zero():
anc = [0, 1, 2, 3, 4, 5, 6] # registers for ancila
cod = [7, 8, 9, 10, 11, 12, 13] # registers for steane code
qs_total = QState(14)
# g1
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cx(anc[0], cod[3]).cx(anc[1],
cod[4]).cx(anc[2],
cod[5]).cx(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.z(cod[0]).z(cod[1]).z(cod[2]).z(cod[3])
qs_total.reset(qid=anc)
# g2
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cx(anc[0], cod[1]).cx(anc[1],
cod[2]).cx(anc[2],
cod[5]).cx(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.z(cod[0]).z(cod[1]).z(cod[4]).z(cod[5])
qs_total.reset(qid=anc)
# g3
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cx(anc[0], cod[0]).cx(anc[1],
cod[2]).cx(anc[2],
cod[4]).cx(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.z(cod[2]).z(cod[4]).z(cod[6])
qs_total.reset(qid=anc)
# g4
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cz(anc[0], cod[3]).cz(anc[1],
cod[4]).cz(anc[2],
cod[5]).cz(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.x(cod[0]).x(cod[1]).x(cod[2]).x(cod[3])
qs_total.reset(qid=anc)
# g5
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cz(anc[0], cod[1]).cz(anc[1],
cod[2]).cz(anc[2],
cod[5]).cz(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.x(cod[0]).x(cod[1]).x(cod[4]).x(cod[5])
qs_total.reset(qid=anc)
# g6
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.cz(anc[0], cod[0]).cz(anc[1],
cod[2]).cz(anc[2],
cod[4]).cz(anc[3], cod[6])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 4)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': qs_total.x(cod[2]).x(cod[4]).x(cod[6])
qs_total.reset(qid=anc)
# g7
qs_total.h(anc[0])
[qs_total.cx(anc[0], anc[i]) for i in range(1, 7)]
[qs_total.cz(anc[i], cod[i]) for i in range(7)]
[qs_total.cx(anc[0], anc[i]) for i in range(1, 7)]
qs_total.h(anc[0])
mval = qs_total.m(qid=[anc[0]]).last
if mval == '1': [qs_total.x(q) for q in cod]
qs_total.reset(qid=anc)
qs = qs_total.partial(qid=cod)
return qs
