def main():
input_data = sys.argv[1:]
# Set node numbers
min_tel = int(input_data[0])
max_tel = int(input_data[1])
number = int(input_data[2])
# Initialize the connection
Bob = CQCConnection("Bob")
for n in range(min_tel, max_tel + 1):
for _ in range(number):
# Start teleporting back and fourth
for _ in range(n):
# Make an EPR pair with other node
q = Bob.recvEPR()
# Receive info about corrections
data = Bob.recvClassical(timout=3600)
Bob.closeClassicalServer()
message = list(data)
a = message[0]
b = message[1]
# Apply corrections
if b == 1:
q.X()
if a == 1:
q.Z()
# Make an EPR pair with next node
qEPR = Bob.recvEPR()
# Apply the local teleportation operations
q.cnot(qEPR)
q.H()
# Measure the qubits
a = q.measure()
b = qEPR.measure()
to_print = "App {}: Measurement outcomes are: a={}, b={}".format(
Bob.name, a, b)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
# Send corrections to other node
Bob.sendClassical("Alice", [a, b])
Bob.closeClassicalChannel("Alice")
# Stop the connection
Bob.close()
def apply_on_target(self, cqc: CQCConnection, control_cqc_name: str,
target: qubit):
# Receive qubit
q = cqc.recvEPR()
remote_result = binStrToInt(cqc.recvClassical())
print("Bob received message: ", remote_result)
if remote_result == 1:
q.X()
q.cnot(target)
q.H()
local_result = q.measure(inplace=True)
q.reset()
print("Bob sent message: ", local_result)
cqc.sendClassical(control_cqc_name, msg=local_result)
def apply_on_control(self, cqc: CQCConnection, target_cqc_name: str,
control: qubit):
# Create an EPR pair
q = cqc.createEPR(target_cqc_name)
control.cnot(q)
local_result = q.measure(inplace=True)
q.reset()
cqc.sendClassical(name=target_cqc_name, msg=local_result)
print("\n ")
print("Alice sent message: ", local_result)
remote_result = binStrToInt(cqc.recvClassical())
print("Alice received message: ", remote_result)
if remote_result == 1:
control.Z()
class Node:
def __init__(self, name):
self.conn = CQCConnection(name)
self.name = name
self.N = 0
self.bases = []
self.raw_key = []
self.sifted_key = []
self.remote_bases = []
def __del__(self):
self.conn.__exit__(None, None, None)
def set_size(self, N):
self.N = N
def send_classical_integer(self, to, integer):
self.conn.sendClassical(
to,
integer.to_bytes((integer.bit_length() + 7) // 8, byteorder="big"))
def recv_classical_integer(self):
return int.from_bytes(self.conn.recvClassical(), byteorder="big")
def send_bases(self, to):
msg = b''
for i, base in enumerate(self.bases):
msg += base.to_bytes(1, byteorder="big")
self.conn.sendClassical(to, msg)
def recv_bases(self):
res = []
msg = self.conn.recvClassical()
for i in range(self.N):
res.append(msg[i])
return res
def compare_bases(self):
for i in range(self.N):
if self.bases[i] == self.remote_bases[i]:
self.sifted_key.append(self.raw_key[i])
def encode_qubit(self, bit, basis):
q = qubit(self.conn)
if bit == 1:
q.X()
if basis == 1:
q.H()
return q
def send_qubits(self, to):
for i in range(self.N):
basis = random.randint(0, 1)
bit = random.randint(0, 1)
self.bases.append(basis)
self.raw_key.append(bit)
q = self.encode_qubit(bit, basis)
self.conn.sendQubit(q, to)
def recv_qubits(self):
for i in range(self.N):
basis = random.randint(0, 1)
self.bases.append(basis)
q = self.conn.recvQubit()
if basis == 1:
q.H()
self.raw_key.append(q.measure())
def __str__(self):
return TEMPLATE.format(self.name, self.bases, self.raw_key,
self.sifted_key)
def main(self):
pass
def main():
input_data = sys.argv[1:]
# Set node numbers
node_nr = int(input_data[0])
tot_nr = int(input_data[1])
next_node_nr = (node_nr + 1) % tot_nr
# Initialize the connection
node = CQCConnection("n" + str(node_nr))
# Create EPR pairs with previous and next node
if node_nr == 0:
# start timer
t1 = timer()
qNext = node.createEPR("n" + str(next_node_nr))
qPrev = node.recvEPR()
else:
qPrev = node.recvEPR()
qNext = node.createEPR("n" + str(next_node_nr))
if node_nr == 0: # this is the first node so create qubit
# Create a qubit to teleport
q = qubit(node)
# Prepare the qubit to teleport in |+>
q.H()
# ------
# Qubit is created, send it to next node
# ------
else: # we are node in chain so receive classical corrections
# Receive info about corrections
data = node.recvClassical()
message = list(data)
a = message[0]
b = message[1]
# Apply corrections
if b == 1:
qPrev.X()
if a == 1:
qPrev.Z()
# ------
# Qubit is receive, send it to next node
# ------
# Apply the local teleportation operations
qPrev.cnot(qNext)
qPrev.H()
# Measure the qubits
a = qPrev.measure()
b = qNext.measure()
to_print = "App {}: Measurement outcomes are: a={}, b={}".format(
node.name, a, b)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
# Send corrections to next node
node.sendClassical("n" + str(next_node_nr), [a, b])
if node_nr == 0: # this is first node, so receive again after qubit traversed chain
# Receive info about corrections
data = node.recvClassical()
message = list(data)
a = message[0]
b = message[1]
# Apply corrections
if b == 1:
qPrev.X()
if a == 1:
qPrev.Z()
# ------
# Qubit is receive, so measure it
# ------
# measure the qubit, print the outcome and record the time it took
m = q.measure()
t2 = timer()
to_print = "App {}: Measurement outcome is: m={}".format(node.name, m)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
to_print = "App {}: Time elapsed: t={}".format(node.name, t2 - t1)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
with open("times_v2.txt", "a") as f:
f.write("{}, {}\n".format(tot_nr, t2 - t1))
# Stop the connection
node.close()
def main():
input_data = sys.argv[1:]
# Set node numbers
min_tel = int(input_data[0])
max_tel = int(input_data[1])
number = int(input_data[2])
# Clear file
with open("times{}_{}_{}.txt".format(min_tel, max_tel, number), "w") as f:
pass
# Initialize the connection
Alice = CQCConnection("Alice")
times = []
for n in range(min_tel, max_tel + 1):
print("========")
print(n)
print("========")
for _ in range(number):
# start timer
t1 = timer()
# Create a qubit to teleport
q = qubit(Alice)
# Prepare the qubit to teleport in |+>
q.H()
# Start teleporting back and fourth
for _ in range(n):
# Make an EPR pair with next node
qEPR = Alice.createEPR("Bob")
# Apply the local teleportation operations
q.cnot(qEPR)
q.H()
# Measure the qubits
a = q.measure()
b = qEPR.measure()
to_print = "App {}: Measurement outcomes are: a={}, b={}".format(
Alice.name, a, b)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
# Send corrections to other node
Alice.sendClassical("Bob", [a, b])
Alice.closeClassicalChannel("Bob")
# Make an EPR pair with other node
q = Alice.createEPR("Bob")
# Receive info about corrections
data = Alice.recvClassical(timout=3600)
Alice.closeClassicalServer()
message = list(data)
a = message[0]
b = message[1]
# Apply corrections
if b == 1:
q.X()
if a == 1:
q.Z()
# measure the qubit, print the outcome and record the time it took
m = q.measure()
t2 = timer()
to_print = "App {}: Measurement outcome is: m={}".format(
Alice.name, m)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
to_print = "App {}: Time elapsed: t={}".format(Alice.name, t2 - t1)
print("|" + "-" * (len(to_print) + 2) + "|")
print("| " + to_print + " |")
print("|" + "-" * (len(to_print) + 2) + "|")
times.append((n, t2 - t1))
with open("times{}_{}_{}.txt".format(min_tel, max_tel, number), "a") as f:
for (n, t) in times:
f.write("{}, {}\n".format(n, t))
# Stop the connection
Alice.close()
