def test_pauli_statevector(qvm: None, quilc: None) -> None:
c = Circuit(2, 2)
c.Rz(0.5, 0)
b = ForestStateBackend()
zi = QubitPauliString(Qubit(0), Pauli.Z)
assert get_pauli_expectation_value(c, zi, b) == 1
c.X(0)
assert get_pauli_expectation_value(c, zi, b) == -1
def test_pauli() -> None:
c = Circuit(2)
c.Rz(0.5, 0)
b = ProjectQBackend()
zi = QubitPauliString({Qubit(0): Pauli.Z})
assert np.isclose(get_pauli_expectation_value(c, zi, b), complex(1))
c.X(0)
assert np.isclose(get_pauli_expectation_value(c, zi, b), complex(-1))
def test_pauli() -> None:
for b in [AerBackend(), AerStateBackend()]:
c = Circuit(2)
c.Rz(0.5, 0)
b.compile_circuit(c)
zi = QubitPauliString(Qubit(0), Pauli.Z)
assert cmath.isclose(get_pauli_expectation_value(c, zi, b), 1)
c.X(0)
assert cmath.isclose(get_pauli_expectation_value(c, zi, b), -1)
def test_pauli_statevector() -> None:
c = Circuit(2)
c.Rz(0.5, 0)
Transform.OptimisePostRouting().apply(c)
b = AerStateBackend()
zi = QubitPauliString(Qubit(0), Pauli.Z)
assert get_pauli_expectation_value(c, zi, b) == 1
c.X(0)
assert get_pauli_expectation_value(c, zi, b) == -1
def test_pauli_sim(qvm: None, quilc: None) -> None:
c = Circuit(2, 2)
c.Rz(0.5, 0)
b = ForestBackend("9q-square")
zi = QubitPauliString(Qubit(0), Pauli.Z)
energy = get_pauli_expectation_value(c, zi, b, 10)
assert abs(energy - 1) < 0.001
c.X(0)
energy = get_pauli_expectation_value(c, zi, b, 10)
assert abs(energy + 1) < 0.001
def test_pauli_sim() -> None:
c = Circuit(2, 2)
c.Rz(0.5, 0)
Transform.OptimisePostRouting().apply(c)
b = AerBackend()
zi = QubitPauliString(Qubit(0), Pauli.Z)
energy = get_pauli_expectation_value(c, zi, b, 8000)
assert abs(energy - 1) < 0.001
c.X(0)
energy = get_pauli_expectation_value(c, zi, b, 8000)
assert abs(energy + 1) < 0.001
def test_expectation() -> None:
b = BraketBackend(local=True)
assert b.supports_expectation
c = Circuit(2, 2)
c.Rz(0.5, 0)
zi = QubitPauliString(Qubit(0), Pauli.Z)
iz = QubitPauliString(Qubit(1), Pauli.Z)
op = QubitPauliOperator({zi: 0.3, iz: -0.1})
assert get_pauli_expectation_value(c, zi, b) == 1
assert get_operator_expectation_value(c, op, b) == pytest.approx(0.2)
c.X(0)
assert get_pauli_expectation_value(c, zi, b) == -1
assert get_operator_expectation_value(c, op, b) == pytest.approx(-0.4)
