def test_three_qubit_gate():
class ThreeQubitGate(cirq.ThreeQubitGate):
pass
q0 = cirq.LineQubit(0)
q1 = cirq.LineQubit(1)
q2 = cirq.LineQubit(2)
circuit = cirq.Circuit(ThreeQubitGate()(q0, q1, q2))
with pytest.raises(TypeError):
cgoc.ConvertToSqrtIswapGates().optimize_circuit(circuit)
def test_two_qubit_gates(gate: cirq.Gate, expected_length: int):
"""Tests that two qubit gates decompose to an equivalent and
serializable circuit with the expected length (or less).
"""
q0 = cirq.GridQubit(5, 3)
q1 = cirq.GridQubit(5, 4)
original_circuit = cirq.Circuit(gate(q0, q1))
converted_circuit = original_circuit.copy()
cgoc.ConvertToSqrtIswapGates().optimize_circuit(converted_circuit)
cig.SQRT_ISWAP_GATESET.serialize(converted_circuit)
assert len(converted_circuit) <= expected_length
assert _unitaries_allclose(original_circuit, converted_circuit)
def test_givens_rotation():
"""Test if the sqrt_iswap synthesis for a givens rotation is correct"""
thetas = np.linspace(0, 2 * np.pi, 100)
qubits = [cirq.NamedQubit('a'), cirq.NamedQubit('b')]
for theta in thetas:
program = cirq.Circuit(cirq.givens(theta).on(qubits[0], qubits[1]))
unitary = cirq.unitary(program)
test_program = program.copy()
cgoc.ConvertToSqrtIswapGates().optimize_circuit(test_program)
test_unitary = cirq.unitary(test_program)
np.testing.assert_allclose(
4, np.abs(np.trace(np.conjugate(np.transpose(test_unitary)) @ unitary))
)
def test_two_qubit_gates_with_symbols(gate: cirq.Gate, expected_length: int):
"""Tests that the gates with symbols decompose without error into a
circuit that has an equivalent unitary form.
"""
q0 = cirq.GridQubit(5, 3)
q1 = cirq.GridQubit(5, 4)
original_circuit = cirq.Circuit(gate(q0, q1))
converted_circuit = original_circuit.copy()
cgoc.ConvertToSqrtIswapGates().optimize_circuit(converted_circuit)
assert len(converted_circuit) <= expected_length
# Check if unitaries are the same
for val in np.linspace(0, 2 * np.pi, 12):
assert _unitaries_allclose(
cirq.resolve_parameters(original_circuit, {'t': val}),
cirq.resolve_parameters(converted_circuit, {'t': val}))
