def _layout_from_raw(initial_layout, circuit):
if isinstance(initial_layout, list):
if all(isinstance(elem, int) for elem in initial_layout):
initial_layout = Layout.from_intlist(initial_layout, *circuit.qregs)
elif all(elem is None or isinstance(elem, tuple) for elem in initial_layout):
initial_layout = Layout.from_tuplelist(initial_layout)
elif isinstance(initial_layout, dict):
initial_layout = Layout(initial_layout)
return initial_layout
def _layout_from_raw(initial_layout, circuit):
if initial_layout is None or isinstance(initial_layout, Layout):
return initial_layout
elif isinstancelist(initial_layout):
if all(isinstanceint(elem) for elem in initial_layout):
initial_layout = Layout.from_intlist(initial_layout, *circuit.qregs)
elif all(elem is None or isinstance(elem, Qubit) for elem in initial_layout):
initial_layout = Layout.from_qubit_list(initial_layout)
elif isinstance(initial_layout, dict):
initial_layout = Layout(initial_layout)
else:
raise TranspilerError("The initial_layout parameter could not be parsed")
return initial_layout
def test_enlarge_with_ancilla(self):
"""This pass tests that idle qubits after an embedding are left idle."""
# Create a four qubit problem.
op = PauliSumOp.from_list([("IZZI", 1), ("ZIIZ", 2), ("ZIZI", 3)])
circ = QuantumCircuit(4)
circ.append(PauliEvolutionGate(op, 1), range(4))
# Create a four qubit quantum circuit.
backend_cmap = CouplingMap(couplinglist=[(0, 1), (1, 2), (1, 3), (3,
4)])
swap_cmap = CouplingMap(couplinglist=[(0, 1), (1, 2), (2, 3)])
swap_strat = SwapStrategy(swap_cmap,
swap_layers=(((0, 1), (2, 3)), ((1, 2), )))
initial_layout = Layout.from_intlist([0, 1, 3, 4], *circ.qregs)
pm_pre = PassManager([
FindCommutingPauliEvolutions(),
Commuting2qGateRouter(swap_strat),
SetLayout(initial_layout),
FullAncillaAllocation(backend_cmap),
EnlargeWithAncilla(),
ApplyLayout(),
])
embedded = pm_pre.run(circ)
expected = QuantumCircuit(5)
expected.append(PauliEvolutionGate(Pauli("ZZ"), 1), (1, 3))
expected.swap(0, 1)
expected.swap(3, 4)
expected.append(PauliEvolutionGate(Pauli("ZZ"), 2), (1, 3))
expected.swap(1, 3)
expected.append(PauliEvolutionGate(Pauli("ZZ"), 3), (0, 1))
self.assertEqual(embedded, expected)
