def test_init_obs_setting():
q0, q1 = cirq.LineQubit.range(2)
setting = InitObsSetting(init_state=cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1),
observable=cirq.X(q0) * cirq.Y(q1))
assert str(setting) == '+Z(q(0)) * +Z(q(1)) → X(q(0))*Y(q(1))'
assert eval(repr(setting)) == setting
with pytest.raises(ValueError):
setting = InitObsSetting(init_state=cirq.KET_ZERO(q0),
observable=cirq.X(q0) * cirq.Y(q1))
def test_observable_to_setting():
q0, q1, q2 = cirq.LineQubit.range(3)
observables = [cirq.X(q0) * cirq.Y(q1), cirq.Z(q2) * 1]
zero_state = cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1) * cirq.KET_ZERO(q2)
settings_should_be = [
InitObsSetting(zero_state, observables[0]),
InitObsSetting(zero_state, observables[1]),
]
assert list(observables_to_settings(observables,
qubits=[q0, q1,
q2])) == settings_should_be
def test_measurement_spec_no_symbols():
q0, q1 = cirq.LineQubit.range(2)
setting = InitObsSetting(init_state=cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1),
observable=cirq.X(q0) * cirq.Y(q1))
meas_spec = _MeasurementSpec(max_setting=setting,
circuit_params={'beta': sympy.Symbol('t')})
with pytest.raises(ValueError, match='Cannot convert'):
_ = hash(meas_spec)
def test_measurement_spec():
q0, q1 = cirq.LineQubit.range(2)
setting = InitObsSetting(init_state=cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1),
observable=cirq.X(q0) * cirq.Y(q1))
meas_spec = _MeasurementSpec(max_setting=setting,
circuit_params={
'beta': 0.123,
'gamma': 0.456
})
meas_spec2 = _MeasurementSpec(max_setting=setting,
circuit_params={
'beta': 0.123,
'gamma': 0.456
})
assert hash(meas_spec) == hash(meas_spec2)
cirq.testing.assert_equivalent_repr(meas_spec)