def main():
a = random.uniform(0.0, 1.0)
b = random.uniform(0.0, 1.0)
phi = random.uniform(0.0, 1.0)
print("a,b = {0:.4f}, {1:.4f}".format(a,b))
print("phi = {0:.4f}".format(phi))
print("** one-way quantum computing")
# graph state
qs_oneway = QState(2)
qs_oneway.ry(0, phase=a).rz(0, phase=b) # input state (random)
qs_oneway.h(1)
qs_oneway.cz(0,1)
# measurement
s = qs_oneway.m([0], shots=1, angle=0.5, phase=phi)
# result state
qs_oneway.show([1])
print("** conventianal quantum gate")
qs_gate = QState(1)
qs_gate.ry(0, phase=a).rz(0, phase=b) # input state (random)
qs_gate.rz(0, phase=-phi).h(0)
qs_gate.show()
from qlazy import QState
BELL_PHI_PLUS = 0
BELL_PHI_MINUS = 3
BELL_PSI_PLUS = 1
BELL_PSI_MINUS = 2
qs = QState(3)
# prepare qubit (id=0) that Alice want to send to Bob by rotating around X,Z
qs.ry(0,phase=0.3).rz(0,phase=0.4)
# make entangled 2 qubits (id=1 for Alice, id=2 for Bob)
qs.h(1).cx(1,2)
# initial state (before teleportation)
print("== Alice (initial) ==")
qs.show([0])
print("== Bob (initial) ==")
qs.show([2])
# Alice execute Bell-measurement to her qubits 0,1
print("== Bell measurement ==")
result = qs.mb([0,1],shots=1).lst
# Bob operate his qubit (id=2) according to the result
if result == BELL_PHI_PLUS:
print("result: phi+")
elif result == BELL_PSI_PLUS:
print("result: psi+")
qs.x(2)
