def test_circuit_set_parameters_with_dictionary(trainable):
"""Check updating parameters of circuit with list."""
params = [0.123, 0.456, 0.789]
c1 = Circuit(3)
c1.add(gates.X(0))
c1.add(gates.X(2))
if trainable:
c1.add(gates.U1(0, theta=0, trainable=trainable))
else:
c1.add(gates.U1(0, theta=params[0], trainable=trainable))
c2 = Circuit(3)
c2.add(gates.RZ(1, theta=0))
c2.add(gates.CZ(1, 2))
c2.add(gates.CU1(0, 2, theta=0))
c2.add(gates.H(2))
c = c1 + c2
if trainable:
params_dict = {c.queue[i]: p for i, p in zip([2, 3, 5], params)}
c.set_parameters(params_dict)
assert c.queue[2].parameters == params[0]
else:
params_dict = {c.queue[3]: params[1], c.queue[5]: params[2]}
c.set_parameters(params_dict)
assert c.queue[3].parameters == params[1]
assert c.queue[5].parameters == params[2]
# test not passing all parametrized gates
c.set_parameters({c.queue[5]: 0.7891})
if trainable:
assert c.queue[2].parameters == params[0]
assert c.queue[3].parameters == params[1]
assert c.queue[5].parameters == 0.7891
def test_singlequbit_gates():
c = Circuit(2)
c.add(gates.H(0))
c.add(gates.X(1))
c.add(gates.Y(0))
c.add(gates.Z(1))
c.add(gates.S(0))
c.add(gates.SDG(1))
c.add(gates.T(0))
c.add(gates.TDG(1))
c.add(gates.I(0))
target = f"""// Generated by QIBO {__version__}
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
h q[0];
x q[1];
y q[0];
z q[1];
s q[0];
sdg q[1];
t q[0];
tdg q[1];
id q[0];"""
assert_strings_equal(c.to_qasm(), target)
def test_x_decomposition_errors(use_toffolis):
"""Check ``X`` decomposition errors."""
gate = gates.X(0).controlled_by(1, 2, 3, 4)
with pytest.raises(ValueError):
decomp = gate.decompose(2, 3, use_toffolis=use_toffolis)
gate.nqubits = 6
with pytest.raises(ValueError):
decomp = gate.decompose(5, 6, use_toffolis=use_toffolis)
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_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_addition_errors():
c1 = Circuit(2)
c1.add(gates.H(0))
c1.add(gates.H(1))
c2 = Circuit(1)
c2.add(gates.X(0))
with pytest.raises(ValueError):
c3 = c1 + c2
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_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_circuit_draw_line_wrap():
"""Test circuit text draw with line wrap."""
ref_line_wrap_50 = \
'q0: ─H─U1─U1─U1─U1───────────────────────────x───I───f ...\n' \
'q1: ───o──|──|──|──H─U1─U1─U1────────────────|─x─I───| ...\n' \
'q2: ──────o──|──|────o──|──|──H─U1─U1────────|─|─────| ...\n' \
'q3: ─────────o──|───────o──|────o──|──H─U1───|─x───M─| ...\n' \
'q4: ────────────o──────────o───────o────o──H─x───────f ...\n' \
'\n' \
'q0: ... ─o────gf───M─\n' \
'q1: ... ─U3───|──o─M─\n' \
'q2: ... ────X─gf─o─M─\n' \
'q3: ... ────o────o───\n' \
'q4: ... ────o────X───'
ref_line_wrap_30 = \
'q0: ─H─U1─U1─U1─U1──────────────── ...\n' \
'q1: ───o──|──|──|──H─U1─U1─U1───── ...\n' \
'q2: ──────o──|──|────o──|──|──H─U1 ...\n' \
'q3: ─────────o──|───────o──|────o─ ...\n' \
'q4: ────────────o──────────o────── ...\n' \
'\n' \
'q0: ... ───────────x───I───f─o────gf── ...\n' \
'q1: ... ───────────|─x─I───|─U3───|──o ...\n' \
'q2: ... ─U1────────|─|─────|────X─gf─o ...\n' \
'q3: ... ─|──H─U1───|─x───M─|────o────o ...\n' \
'q4: ... ─o────o──H─x───────f────o────X ...\n' \
'\n' \
'q0: ... ─M─\n' \
'q1: ... ─M─\n' \
'q2: ... ─M─\n' \
'q3: ... ───\n' \
'q4: ... ───'
import numpy as np
circuit = Circuit(5)
for i1 in range(5):
circuit.add(gates.H(i1))
for i2 in range(i1 + 1, 5):
circuit.add(gates.CU1(i2, i1, theta=0))
circuit.add(gates.SWAP(0, 4))
circuit.add(gates.SWAP(1, 3))
circuit.add(gates.I(*range(2)))
circuit.add(gates.M(3, collapse=True))
circuit.add(gates.fSim(0, 4, 0, 0))
circuit.add(gates.CU3(0, 1, 0, 0, 0))
circuit.add(gates.TOFFOLI(4, 3, 2))
circuit.add(gates.GeneralizedfSim(0, 2, np.eye(2), 0))
circuit.add(gates.X(4).controlled_by(1, 2, 3))
circuit.add(gates.M(*range(3)))
assert circuit.draw(line_wrap=50) == ref_line_wrap_50
assert circuit.draw(line_wrap=30) == ref_line_wrap_30
def test_measurements():
c = Circuit(2)
c.add(gates.X(0))
c.add(gates.Y(1))
c.add(gates.M(0, 1))
target = f"""// Generated by QIBO {__version__}
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg register0[2];
x q[0];
y q[1];
measure q[0] -> register0[0];
measure q[1] -> register0[1];"""
assert_strings_equal(c.to_qasm(), target)
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_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_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_x_decompose_with_cirq(target, controls, free):
"""Check that decomposition of multi-control ``X`` agrees with Cirq."""
import cirq
from qibo.tests import cirq_utils
gate = gates.X(target).controlled_by(*controls)
qibo_decomp = gate.decompose(*free, use_toffolis=False)
# Calculate the decomposition using Cirq.
nqubits = max((target, ) + controls + free) + 1
qubits = [cirq.LineQubit(i) for i in range(nqubits)]
controls = [qubits[i] for i in controls]
free = [qubits[i] for i in free]
cirq_decomp = cirq.decompose_multi_controlled_x(controls, qubits[target],
free)
assert len(qibo_decomp) == len(cirq_decomp)
for qibo_gate, cirq_gate in zip(qibo_decomp, cirq_decomp):
cirq_utils.assert_gates_equivalent(qibo_gate, cirq_gate)
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_toffoli():
c = Circuit(3)
c.add(gates.Y(0))
c.add(gates.TOFFOLI(0, 1, 2))
c.add(gates.X(1))
c.add(gates.TOFFOLI(0, 2, 1))
c.add(gates.Z(2))
c.add(gates.TOFFOLI(1, 2, 0))
target = f"""// Generated by QIBO {__version__}
OPENQASM 2.0;
include "qelib1.inc";
qreg q[3];
y q[0];
ccx q[0],q[1],q[2];
x q[1];
ccx q[0],q[2],q[1];
z q[2];
ccx q[1],q[2],q[0];"""
assert_strings_equal(c.to_qasm(), target)
def test_x_decompose_with_few_controls():
"""Check ``X`` decomposition with less than three controls."""
gate = gates.X(0)
decomp = gate.decompose(1, 2)
assert len(decomp) == 1
assert isinstance(decomp[0], gates.X)
def test_x_controlled_by(controls, instance):
gate = gates.X(0).controlled_by(*controls)
assert gate.target_qubits == (0,)
assert gate.control_qubits == controls
assert isinstance(gate, getattr(gates, instance))
