def test_invalid_cphase_exponents(theta, phi):
fsim_gate = cirq.FSimGate(theta=theta, phi=phi)
valid_exponent_intervals = cirq.compute_cphase_exponents_for_fsim_decomposition(fsim_gate)
invalid_exponent_intervals = complement_intervals(valid_exponent_intervals)
assert invalid_exponent_intervals
for min_exponent, max_exponent in invalid_exponent_intervals:
margin = 1e-8
min_exponent += margin
max_exponent -= margin
assert min_exponent < max_exponent
for exponent in np.linspace(min_exponent, max_exponent, 3):
with pytest.raises(ValueError):
cphase_gate = cirq.CZPowGate(exponent=exponent)
assert_decomposition_valid(cphase_gate, fsim_gate=fsim_gate)
def test_valid_cphase_exponents(theta, phi):
fsim_gate = cirq.FSimGate(theta=theta, phi=phi)
valid_exponent_intervals = cirq.compute_cphase_exponents_for_fsim_decomposition(fsim_gate)
assert valid_exponent_intervals
for min_exponent, max_exponent in valid_exponent_intervals:
margin = 1e-8
min_exponent += margin
max_exponent -= margin
assert min_exponent < max_exponent
for exponent in np.linspace(min_exponent, max_exponent, 3):
for d in (-2, 0, 4):
cphase_gate = cirq.CZPowGate(exponent=exponent + d)
assert_decomposition_valid(cphase_gate, fsim_gate=fsim_gate)
cphase_gate = cirq.CZPowGate(exponent=-exponent + d)
assert_decomposition_valid(cphase_gate, fsim_gate=fsim_gate)
def test_symbols():
with pytest.raises(ValueError, match='Symbolic arguments'):
cirq.compute_cphase_exponents_for_fsim_decomposition(
cirq.FSimGate(theta=sympy.Symbol('t'), phi=sympy.Symbol('phi')))