量子超密编码

import sys
sys.path.append('../../..')  # "from QCompute import *" requires this
from QCompute import *

matchSdkVersion('Python 3.3.3')

# Set the shot number for each quest
shots = 1024

# The message that Alice want to send to Bob.
# The user you can modify the massage to '00', '01' or '10' as you like
message = '11'


def main():
    """
    main
    """
    # Create environment
    env = QEnv()
    # Choose backend Baidu Local Quantum Simulator-Sim2
    env.backend(BackendName.LocalBaiduSim2)
    
    # Initialize the two-qubit circuit
    q = env.Q.createList(2)
    
    # Alice and Bob share a Bell state (|00>+|11>) / sqrt(2),
    # where Alice holds q[0] and Bob holds q[1]
    H(q[0])
    CX(q[0], q[1])

    # For different messages, Alice applies different gates on q[0],
    # where she applies nothing to indicate the message '00'
    if message == '01':
        Z(q[0])
    elif message == '10':
        X(q[0])
    elif message == '11':
        # Here ZX = iY
        Z(q[0])
        X(q[0])
    
    # Alice sends her qubit q[0] to Bob,
    # and then Bob decodes the two qubits.
    # Bob needs to measure the two qubits with Bell basis,
    # or transforms the state to computational basis
    # and measures it with the computational basis
    CX(q[0], q[1])
    H(q[0])
    
    # Measure with the computational basis
    MeasureZ(*env.Q.toListPair())
    # Commit the quest
    taskResult = env.commit(shots, fetchMeasure=True)
    print(taskResult['counts'])


if __name__ == '__main__':
    main()

{'11': 1024}