def apply(self,
operations: Sequence[Operation],
rotations: Sequence[Operation] = None,
**run_kwargs) -> Circuit:
"""Instantiate Braket Circuit object."""
rotations = rotations or []
circuit = Circuit()
# Add operations to Braket Circuit object
for operation in operations + rotations:
params = [
p.numpy() if isinstance(p, np.tensor) else p
for p in operation.parameters
]
gate = translate_operation(operation, params)
dev_wires = self.map_wires(operation.wires).tolist()
ins = Instruction(gate, dev_wires)
circuit.add_instruction(ins)
unused = set(range(
self.num_wires)) - {int(qubit)
for qubit in circuit.qubits}
# To ensure the results have the right number of qubits
for qubit in sorted(unused):
circuit.i(qubit)
return circuit
def test_translate_operation_inverse(pl_cls, braket_cls, qubits, params, inv_params):
"""Tests that inverse gates are translated correctly"""
pl_op = pl_cls(*params, wires=qubits).inv()
braket_gate = braket_cls(*inv_params)
assert translate_operation(pl_op) == braket_gate
assert _braket_to_pl[
braket_gate.to_ir(qubits).__class__.__name__.lower().replace("_", "")
] == pl_op.name.replace(".inv", "")
def test_translate_operation_named_inverse(pl_cls, braket_cls, qubit):
"""Tests that operations whose inverses are named Braket gates are inverted correctly"""
pl_op = pl_cls(wires=[qubit]).inv()
braket_gate = braket_cls()
assert translate_operation(pl_op) == braket_gate
assert (
_braket_to_pl[braket_gate.to_ir([qubit]).__class__.__name__.lower().replace("_", "")]
== pl_op.name
)
def test_translate_operation_iswap_inverse():
"""Tests that the iSwap gate is inverted correctly"""
assert translate_operation(qml.ISWAP(wires=[0, 1]).inv()) == gates.PSwap(3 * np.pi / 2)