def test_pauli_sum_exponential_parameterized_matrix_raises():
with pytest.raises(ValueError, match='parameterized'):
cirq.PauliSumExponential(
cirq.X(q0) + cirq.Z(q1), sympy.Symbol("theta")).matrix()
def test_with_parameters_resolved_by(psum, exp):
psum_exp = cirq.PauliSumExponential(psum, sympy.Symbol("theta"))
resolver = cirq.ParamResolver({"theta": exp})
actual = cirq.resolve_parameters(psum_exp, resolver)
expected = cirq.PauliSumExponential(psum, exp)
assert actual == expected
def test_raises_for_non_commuting_paulis():
with pytest.raises(ValueError, match='commuting'):
cirq.PauliSumExponential(cirq.X(q0) + cirq.Z(q0), np.pi / 2)
def test_raises_for_non_hermitian_pauli():
with pytest.raises(ValueError, match='hermitian'):
cirq.PauliSumExponential(cirq.X(q0) + 1j * cirq.Z(q1), np.pi / 2)
def test_raises_for_non_commuting_paulis():
with pytest.raises(ValueError, match='commuting'):
cirq.PauliSumExponential(cirq.X(q0) + cirq.Z(q0), np.pi / 2)
def test_raises_for_non_hermitian_pauli():
with pytest.raises(ValueError, match='hermitian'):
cirq.PauliSumExponential(cirq.X(q0) + 1j * cirq.Z(q1), np.pi / 2)
@pytest.mark.parametrize(
'psum_exp, expected_qubits',
(
(cirq.PauliSumExponential(cirq.Z(q1), np.pi / 2), (q1, )),
(
cirq.PauliSumExponential(2j * cirq.X(q0) + 3j * cirq.Y(q2),
sympy.Symbol("theta")),
(q0, q2),
),
(
cirq.PauliSumExponential(
cirq.X(q0) * cirq.Y(q1) + cirq.Y(q2) * cirq.Z(q3), np.pi),
(q0, q1, q2, q3),
),
),
)
def test_pauli_sum_exponential_qubits(psum_exp, expected_qubits):
assert psum_exp.qubits == expected_qubits
