def test_gate_types():
import collections
c = Circuit(3)
c.add(gates.H(0))
c.add(gates.H(1))
c.add(gates.X(2))
c.add(gates.CNOT(0, 2))
c.add(gates.CNOT(1, 2))
c.add(gates.TOFFOLI(0, 1, 2))
target_counter = collections.Counter({"h": 2, "x": 1, "cx": 2, "ccx": 1})
assert c.ngates == 6
assert c.gate_types == target_counter
def test_summary():
c = Circuit(3)
c.add(gates.H(0))
c.add(gates.H(1))
c.add(gates.CNOT(0, 2))
c.add(gates.CNOT(1, 2))
c.add(gates.TOFFOLI(0, 1, 2))
c.add(gates.H(2))
target_summary = "\n".join([
"Circuit depth = 5", "Total number of gates = 6",
"Number of qubits = 3", "Most common gates:", "h: 3", "cx: 2", "ccx: 1"
])
assert c.summary() == target_summary
def test_circuit_add_iterable():
c = Circuit(2)
# adding list
gatelist = [gates.H(0), gates.H(1), gates.CNOT(0, 1)]
c.add(gatelist)
assert c.depth == 2
assert c.ngates == 3
assert list(c.queue) == gatelist
# adding tuple
gatetuple = (gates.H(0), gates.H(1), gates.CNOT(0, 1))
c.add(gatetuple)
assert c.depth == 4
assert c.ngates == 6
assert isinstance(c.queue[-1], gates.CNOT)
def test_gates_of_type():
c = Circuit(3)
c.add(gates.H(0))
c.add(gates.H(1))
c.add(gates.CNOT(0, 2))
c.add(gates.X(1))
c.add(gates.CNOT(1, 2))
c.add(gates.TOFFOLI(0, 1, 2))
c.add(gates.H(2))
h_gates = c.gates_of_type(gates.H)
cx_gates = c.gates_of_type("cx")
assert h_gates == [(0, c.queue[0]), (1, c.queue[1]), (6, c.queue[6])]
assert cx_gates == [(2, c.queue[2]), (4, c.queue[4])]
with pytest.raises(TypeError):
c.gates_of_type(5)
def test_cnot_and_cz_init():
gate = gates.CNOT(0, 1)
assert gate.target_qubits == (1,)
assert gate.control_qubits == (0,)
gate = gates.CZ(3, 2)
assert gate.target_qubits == (2,)
assert gate.control_qubits == (3,)
def test_circuit_copy_with_measurements():
c1 = Circuit(4)
c1.add([gates.H(0), gates.H(3), gates.CNOT(0, 2)])
c1.add(gates.M(0, 1, register_name="a"))
c1.add(gates.M(3, register_name="b"))
c2 = c1.copy()
assert c2.measurement_gate is c1.measurement_gate
assert c2.measurement_tuples == {"a": (0, 1), "b": (3, )}
def test_queue_class():
from qibo.abstractions.circuit import _Queue
queue = _Queue(4)
gatelist = [gates.H(0), gates.H(1), gates.X(0),
gates.H(2), gates.CNOT(1, 2), gates.Y(3)]
for g in gatelist:
queue.append(g)
assert queue.moments == [[gatelist[0], gatelist[1], gatelist[3], gatelist[5]],
[gatelist[2], gatelist[4], gatelist[4], None]]
def test_circuit_add():
c = Circuit(2)
g1, g2, g3 = gates.H(0), gates.H(1), gates.CNOT(0, 1)
c.add(g1)
c.add(g2)
c.add(g3)
assert c.depth == 2
assert c.ngates == 3
assert list(c.queue) == [g1, g2, g3]
def test_fused_gate():
gate = gates.FusedGate(0, 1)
gate.append(gates.H(0))
gate.append(gates.CNOT(0, 1))
assert len(gate.gates) == 2
gate.prepend(gates.TOFFOLI(0, 1, 2))
assert gate.qubits == (0, 1, 2)
assert len(gate.gates) == 3
assert isinstance(gate.gates[0], gates.TOFFOLI)
def test_circuit_copy(deep):
c1 = Circuit(2)
c1.add([gates.H(0), gates.H(1), gates.CNOT(0, 1)])
c2 = c1.copy(deep)
assert c2.depth == c1.depth
assert c2.ngates == c1.ngates
assert c2.nqubits == c1.nqubits
for g1, g2 in zip(c1.queue, c2.queue):
if deep:
assert g1.__class__ == g2.__class__
assert g1.target_qubits == g2.target_qubits
assert g1.control_qubits == g2.control_qubits
else:
assert g1 is g2
def test_controlled_by():
gate = gates.RX(0, 0.1234).controlled_by(1, 2, 3)
assert gate.target_qubits == (0,)
assert gate.control_qubits == (1, 2, 3)
assert gate.is_controlled_by
assert isinstance(gate, gates.RX)
with pytest.raises(RuntimeError):
gate = gates.CNOT(0, 1).controlled_by(2)
gate = gates.RY(0, 0.1234)
gate.nqubits = 5
with pytest.raises(RuntimeError):
gate = gate.controlled_by(2)
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_circuit_on_qubits():
c = Circuit(3)
c.add([gates.H(0), gates.X(1), gates.Y(2)])
c.add([gates.CNOT(0, 1), gates.CZ(1, 2)])
c.add(gates.H(1).controlled_by(0, 2))
new_gates = list(c.on_qubits(2, 5, 4))
assert new_gates[0].target_qubits == (2, )
assert new_gates[1].target_qubits == (5, )
assert new_gates[2].target_qubits == (4, )
assert new_gates[3].target_qubits == (5, )
assert new_gates[3].control_qubits == (2, )
assert new_gates[4].target_qubits == (4, )
assert new_gates[4].control_qubits == (5, )
assert new_gates[5].target_qubits == (5, )
assert new_gates[5].control_qubits == (2, 4)
def test_gates_commute():
assert gates.H(0).commutes(gates.X(1))
assert gates.H(0).commutes(gates.H(1))
assert gates.H(0).commutes(gates.H(0))
assert not gates.H(0).commutes(gates.Y(0))
assert not gates.CNOT(0, 1).commutes(gates.SWAP(1, 2))
assert not gates.CNOT(0, 1).commutes(gates.H(1))
assert not gates.CNOT(0, 1).commutes(gates.Y(0).controlled_by(2))
assert not gates.CNOT(2, 3).commutes(gates.CNOT(3, 0))
assert gates.CNOT(0, 1).commutes(gates.Y(2).controlled_by(0))
def test_circuit_invert(measurements):
c = Circuit(3)
gatelist = [gates.H(0), gates.X(1), gates.Y(2),
gates.CNOT(0, 1), gates.CZ(1, 2)]
c.add(gatelist)
if measurements:
c.add(gates.M(0, 2))
invc = c.invert()
for g1, g2 in zip(invc.queue, gatelist[::-1]):
g2 = g2.dagger()
assert isinstance(g1, g2.__class__)
assert g1.target_qubits == g2.target_qubits
assert g1.control_qubits == g2.control_qubits
if measurements:
assert invc.measurement_gate.target_qubits == (0, 2)
assert invc.measurement_tuples == {"register0": (0, 2)}
def test_multiqubit_gates():
c = Circuit(2)
c.add(gates.H(0))
c.add(gates.CNOT(0, 1))
c.add(gates.X(1))
c.add(gates.SWAP(0, 1))
c.add(gates.X(0).controlled_by(1))
# `controlled_by` here falls back to CNOT and should work
target = f"""// Generated by QIBO {__version__}
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
h q[0];
cx q[0],q[1];
x q[1];
swap q[0],q[1];
cx q[1],q[0];"""
assert_strings_equal(c.to_qasm(), target)
def test_circuit_decompose(measurements):
c = Circuit(4)
c.add([gates.H(0), gates.X(1), gates.Y(2)])
c.add([gates.CZ(0, 1), gates.CNOT(2, 3), gates.TOFFOLI(0, 1, 3)])
if measurements:
c.add(gates.M(0, 2))
decompc = c.decompose()
dgates = []
for gate in c.queue:
dgates.extend(gate.decompose())
for g1, g2 in zip(decompc.queue, dgates):
assert isinstance(g1, g2.__class__)
assert g1.target_qubits == g2.target_qubits
assert g1.control_qubits == g2.control_qubits
if measurements:
assert decompc.measurement_gate.target_qubits == (0, 2)
assert decompc.measurement_tuples == {"register0": (0, 2)}
def test_circuit_addition(measurements):
c1 = Circuit(2)
g1, g2 = gates.H(0), gates.CNOT(0, 1)
c1.add(g1)
c1.add(g2)
if measurements:
c1.add(gates.M(0, register_name="a"))
c2 = Circuit(2)
g3 = gates.H(1)
c2.add(g3)
if measurements:
c2.add(gates.M(1, register_name="b"))
c3 = c1 + c2
assert c3.depth == 3
assert list(c3.queue) == [g1, g2, g3]
if measurements:
assert c3.measurement_tuples == {"a": (0, ), "b": (1, )}
assert c3.measurement_gate.target_qubits == (0, 1)
def test_circuit_draw_callbacks(legend):
"""Check that callbacks are drawn correcly"""
from qibo.callbacks import EntanglementEntropy
entropy = EntanglementEntropy([0])
c = Circuit(2)
c.add(gates.CallbackGate(entropy))
c.add(gates.H(0))
c.add(gates.CallbackGate(entropy))
c.add(gates.CNOT(0, 1))
c.add(gates.CallbackGate(entropy))
ref = 'q0: ─EE─H─EE─o─EE─\n' \
'q1: ─EE───EE─X─EE─'
if legend:
ref += '\n\n Legend for callbacks and channels: \n' \
'| Gate | Symbol |\n'\
'|---------------------+----------|\n'\
'| EntanglementEntropy | EE |'
assert c.draw(legend=legend) == ref
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_fused_gate():
gate = gates.FusedGate(0, 1)
gate.add(gates.H(0))
gate.add(gates.CNOT(0, 1))
with pytest.raises(ValueError):
gate.add(gates.CZ(1, 2))
def test_on_qubits():
gate = gates.CNOT(0, 1)._on_qubits(2, 3)
assert gate.target_qubits == (3,)
assert gate.control_qubits == (2,)
assert isinstance(gate, gates.CNOT)
def gen():
yield gates.H(0)
yield gates.H(1)
yield gates.CNOT(0, 1)
