def test_circuit(boolean_str):
boolean_expr = sympy_parser.parse_expr(boolean_str)
var_names = cirq.parameter_names(boolean_expr)
qubits = [cirq.NamedQubit(name) for name in var_names]
# We use Sympy to evaluate the expression:
n = len(var_names)
expected = []
for binary_inputs in itertools.product([0, 1], repeat=n):
subed_expr = boolean_expr
for var_name, binary_input in zip(var_names, binary_inputs):
subed_expr = subed_expr.subs(var_name, binary_input)
expected.append(bool(subed_expr))
# We build a circuit and look at its output state vector:
circuit = cirq.Circuit()
circuit.append(cirq.H.on_each(*qubits))
hamiltonian_gate = cirq.BooleanHamiltonian({q.name: q
for q in qubits},
[boolean_str], 0.1 * math.pi)
assert hamiltonian_gate.num_qubits() == n
circuit.append(hamiltonian_gate)
phi = cirq.Simulator().simulate(circuit,
qubit_order=qubits,
initial_state=0).state_vector()
actual = np.arctan2(phi.real, phi.imag) - math.pi / 2.0 > 0.0
# Compare the two:
np.testing.assert_array_equal(actual, expected)
def test_with_custom_names():
q0, q1, q2, q3 = cirq.LineQubit.range(4)
original_op = cirq.BooleanHamiltonian(
{
'a': q0,
'b': q1
},
['a'],
0.1,
)
assert cirq.decompose(original_op) == [cirq.Rz(rads=-0.05).on(q0)]
renamed_op = original_op.with_qubits(q2, q3)
assert cirq.decompose(renamed_op) == [cirq.Rz(rads=-0.05).on(q2)]
with pytest.raises(ValueError,
match='Length of replacement qubits must be the same'):
original_op.with_qubits(q2)
def test_with_custom_names():
q0, q1, q2, q3 = cirq.LineQubit.range(4)
with cirq.testing.assert_deprecated(
'Use cirq.BooleanHamiltonianGate', deadline='v0.15', count=3
):
original_op = cirq.BooleanHamiltonian(
{'a': q0, 'b': q1},
['a'],
0.1,
)
assert cirq.decompose(original_op) == [cirq.Rz(rads=-0.05).on(q0)]
renamed_op = original_op.with_qubits(q2, q3)
assert cirq.decompose(renamed_op) == [cirq.Rz(rads=-0.05).on(q2)]
with pytest.raises(ValueError, match='Length of replacement qubits must be the same'):
original_op.with_qubits(q2)
with pytest.raises(ValueError, match='All qubits must be 2-dimensional'):
original_op.with_qubits(q0, cirq.LineQid(1, 3))