pennylane_lightning_qubit_expectation_value_quickstart.py

1import pennylane as qml
2
3# Define a device using the lightning.qubit backend
4dev = qml.device("lightning.qubit", wires=2)
5
6@qml.qnode(dev)
7def circuit(x, y):
8    qml.RX(x, wires=0)
9    qml.RY(y, wires=1)
10    qml.CNOT(wires=[0, 1])
11    return qml.expval(qml.PauliZ(0))
12
13# Execute the circuit
14result = circuit(0.1, 0.2)
15print(f"Expectation value: {result}")