def test_circuit_draw_channels(legend):
"""Check that channels are drawn correctly"""
from qibo.models import Circuit as circuit
c = circuit(2, density_matrix=True)
c.add(gates.H(0))
c.add(gates.PauliNoiseChannel(0, 0.1, 0.0, 0.2))
c.add(gates.H(1))
c.add(gates.PauliNoiseChannel(1, 0.0, 0.2, 0.1))
c.add(gates.CNOT(0, 1))
c.add(gates.PauliNoiseChannel(0, 0.1, 0.0, 0.2))
c.add(gates.PauliNoiseChannel(1, 0.0, 0.2, 0.1))
ref = 'q0: ─H─PN─o─PN─\n' \
'q1: ─H─PN─X─PN─'
if legend:
ref += '\n\n Legend for callbacks and channels: \n' \
'| Gate | Symbol |\n' \
'|-------------------+----------|\n' \
'| PauliNoiseChannel | PN |'
assert c.draw(legend=legend) == ref
def test_circuit_with_noise(measurements, noise_map):
c = Circuit(2)
c.add([gates.H(0), gates.H(1), gates.CNOT(0, 1)])
if measurements:
c.add(gates.M(0, 1))
noisyc = c.with_noise(noise_map)
if not isinstance(noise_map, dict):
noise_map = {0: noise_map, 1: noise_map}
targetc = Circuit(2)
targetc.add(gates.H(0))
targetc.add(gates.PauliNoiseChannel(0, *noise_map[0]))
targetc.add(gates.H(1))
targetc.add(gates.PauliNoiseChannel(1, *noise_map[1]))
targetc.add(gates.CNOT(0, 1))
targetc.add(gates.PauliNoiseChannel(0, *noise_map[0]))
targetc.add(gates.PauliNoiseChannel(1, *noise_map[1]))
for g1, g2 in zip(noisyc.queue, targetc.queue):
assert isinstance(g1, g2.__class__)
assert g1.target_qubits == g2.target_qubits
assert g1.control_qubits == g2.control_qubits
if measurements:
assert noisyc.measurement_gate.target_qubits == (0, 1)
assert noisyc.measurement_tuples == {"register0": (0, 1)}
def test_pauli_noise_channel_init():
gate = gates.PauliNoiseChannel(0, 0.1, 0.2, 0.3)
assert gate.target_qubits == (0,)
assert isinstance(gate.gates[0], gates.X)
assert isinstance(gate.gates[1], gates.Y)
assert isinstance(gate.gates[2], gates.Z)