def test_get_acquaintance_size():
qubits = cirq.LineQubit.range(8)
op = OtherOperation(qubits)
assert op.with_qubits(qubits) == op
assert cca.get_acquaintance_size(op) == 0
for s, _ in enumerate(qubits):
op = cca.acquaint(*qubits[:s + 1])
assert cca.get_acquaintance_size(op) == s + 1
part_lens = (2, 2, 2, 2)
acquaintance_size = 3
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
op = gate(*qubits[:sum(part_lens)])
assert cca.get_acquaintance_size(op) == 3
part_lens = (2, 2, 2, 2)
acquaintance_size = 4
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
op = gate(*qubits[:sum(part_lens)])
assert cca.get_acquaintance_size(op) == 0
part_lens = (2, 2, 2, 2)
acquaintance_size = 1
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
op = gate(*qubits[:sum(part_lens)])
assert cca.get_acquaintance_size(op) == 0
part_lens = (2, 2, 2, 2)
acquaintance_size = 1
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
op = gate(*qubits[:sum(part_lens)])
assert cca.get_acquaintance_size(op) == 0
def test_swap_network_gate_equality(part_len_sets):
acquaintance_sizes = [None, 0, 1, 2, 3]
swap_gates = [cirq.SWAP, cirq.CNOT]
equals_tester = ct.EqualsTester()
for args in product(part_len_sets, acquaintance_sizes, swap_gates):
first_gate = cca.SwapNetworkGate(*args)
second_gate = cca.SwapNetworkGate(*args)
equals_tester.add_equality_group(first_gate, second_gate)
def test_swap_network_permutation(part_lens, acquaintance_size):
n_qubits = sum(part_lens)
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
expected_permutation = {i: j for i, j in
zip(range(n_qubits), reversed(range(n_qubits)))}
assert gate.permutation(n_qubits) == expected_permutation
def test_swap_network_gate_permutation(part_lens, acquaintance_size):
n_qubits = sum(part_lens)
qubits = cirq.LineQubit.range(n_qubits)
swap_network_gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
operations = cirq.decompose_once_with_qubits(swap_network_gate, qubits)
operations = list(cirq.flatten_op_tree(operations))
mapping = {q: i for i, q in enumerate(qubits)}
cca.update_mapping(mapping, operations)
assert mapping == {q: i for i, q in enumerate(reversed(qubits))}
def test_acquaintance_device():
with pytest.raises(ValueError):
op = cirq.X(cirq.NamedQubit('q'))
cca.UnconstrainedAcquaintanceDevice.validate_operation(op)
qubits = cirq.LineQubit.range(4)
swap_network = cca.SwapNetworkGate((1, 2, 1))
cca.UnconstrainedAcquaintanceDevice.validate_operation(
cca.acquaint(*qubits[:2]))
cca.UnconstrainedAcquaintanceDevice.validate_operation(
swap_network(*qubits))
def test_acquaint_part_pairs(part_lens):
parts = []
n_qubits = 0
for part_len in part_lens:
parts.append(tuple(range(n_qubits, n_qubits + part_len)))
n_qubits += part_len
qubits = cirq.LineQubit.range(n_qubits)
swap_network_op = cca.SwapNetworkGate(part_lens, acquaintance_size=None)(*qubits)
swap_network = cirq.Circuit(swap_network_op)
initial_mapping = {q: i for i, q in enumerate(qubits)}
actual_opps = cca.get_logical_acquaintance_opportunities(swap_network, initial_mapping)
expected_opps = set(frozenset(s + t) for s, t in combinations(parts, 2))
assert expected_opps == actual_opps
def test_swap_network_decomposition():
qubits = cirq.LineQubit.range(8)
swap_network_gate = cca.SwapNetworkGate((4, 4), 5)
operations = cirq.decompose_once_with_qubits(swap_network_gate, qubits)
circuit = cirq.Circuit(operations)
expected_text_diagram = """
0: ───█─────────────█─────────────╲0╱─────────────█─────────█───────0↦2───
│ │ │ │ │ │
1: ───█─────────────█─────────────╲1╱─────────────█─────────█───────1↦3───
│ │ │ │ │ │
2: ───█─────────────█───1↦0───────╲2╱───────1↦0───█─────────█───────2↦0───
│ │ │ │ │ │ │ │
3: ───█───█─────────█───0↦1───█───╲3╱───█───0↦1───█─────────█───█───3↦1───
│ │ │ │ │ │ │ │ │ │
4: ───█───█───0↦1───█─────────█───╱4╲───█─────────█───0↦1───█───█───4↦6───
│ │ │ │ │ │ │ │
5: ───────█───1↦0─────────────█───╱5╲───█─────────────1↦0───────█───5↦7───
│ │ │ │ │ │
6: ───────█───────────────────█───╱6╲───█───────────────────────█───6↦4───
│ │ │ │ │ │
7: ───────█───────────────────█───╱7╲───█───────────────────────█───7↦5───
""".strip()
ct.assert_has_diagram(circuit, expected_text_diagram)
def test_swap_network_decomposition():
qubits = cirq.LineQubit.range(8)
swap_network_gate = cca.SwapNetworkGate((4, 4), 5)
operations = cirq.decompose_once_with_qubits(swap_network_gate, qubits)
circuit = cirq.Circuit.from_ops(operations)
actual_text_diagram = circuit.to_text_diagram()
expected_text_diagram = """
0: ───█─────────────█─────────────╲0╱─────────────█─────────█───────0↦2───
│ │ │ │ │ │
1: ───█─────────────█─────────────╲1╱─────────────█─────────█───────1↦3───
│ │ │ │ │ │
2: ───█─────────────█───1↦0───────╲2╱───────1↦0───█─────────█───────2↦0───
│ │ │ │ │ │ │ │
3: ───█───█─────────█───0↦1───█───╲3╱───█───0↦1───█─────────█───█───3↦1───
│ │ │ │ │ │ │ │ │
4: ───█───█───0↦1───█─────────█───╱4╲───█─────────█───0↦1───█───█───0↦2───
│ │ │ │ │ │ │ │
5: ───────█───1↦0─────────────█───╱5╲───█─────────────1↦0───────█───1↦3───
│ │ │ │ │ │
6: ───────█───────────────────█───╱6╲───█───────────────────────█───2↦0───
│ │ │ │ │ │
7: ───────█───────────────────█───╱7╲───█───────────────────────█───3↦1───
""".strip()
assert actual_text_diagram == expected_text_diagram
def test_swap_network_gate():
qubits = tuple(cirq.NamedQubit(s) for s in alphabet)
acquaintance_size = 3
n_parts = 3
part_lens = (acquaintance_size - 1, ) * n_parts
n_qubits = sum(part_lens)
swap_network_op = cca.SwapNetworkGate(
part_lens, acquaintance_size=acquaintance_size)(*qubits[:n_qubits])
swap_network = cirq.Circuit(swap_network_op)
expected_text_diagram = """
a: ───×(0,0)───
│
b: ───×(0,1)───
│
c: ───×(1,0)───
│
d: ───×(1,1)───
│
e: ───×(2,0)───
│
f: ───×(2,1)───
""".strip()
ct.assert_has_diagram(swap_network, expected_text_diagram)
no_decomp = lambda op: isinstance(op.gate, (cca.CircularShiftGate, cca.
LinearPermutationGate))
expander = cirq.ExpandComposite(no_decomp=no_decomp)
expander(swap_network)
expected_text_diagram = """
a: ───█───────╲0╱───█─────────────────█───────────╲0╱───█───────0↦1───
│ │ │ │ │ │ │
b: ───█───█───╲1╱───█───█─────────────█───█───────╲1╱───█───█───1↦0───
│ │ │ │ │ │ │ │ │ │ │
c: ───█───█───╱2╲───█───█───█───╲0╱───█───█───█───╱2╲───█───█───2↦3───
│ │ │ │ │ │ │ │ │ │
d: ───────█───╱3╲───█───█───█───╲1╱───█───█───█───╱3╲───────█───3↦2───
│ │ │ │ │ │
e: ─────────────────█───────█───╱2╲───█───────█─────────────────4↦5───
│ │ │ │
f: ─────────────────█───────────╱3╲───█─────────────────────────5↦4───
""".strip()
ct.assert_has_diagram(swap_network, expected_text_diagram)
no_decomp = lambda op: isinstance(op.gate, cca.CircularShiftGate)
expander = cirq.ExpandComposite(no_decomp=no_decomp)
acquaintance_size = 3
n_parts = 6
part_lens = (1, ) * n_parts
n_qubits = sum(part_lens)
swap_network_op = cca.SwapNetworkGate(
part_lens, acquaintance_size=acquaintance_size)(*qubits[:n_qubits])
swap_network = cirq.Circuit(swap_network_op)
expander(swap_network)
expected_text_diagram = """
a: ───╲0╱─────────╲0╱─────────╲0╱─────────
│ │ │
b: ───╱1╲───╲0╱───╱1╲───╲0╱───╱1╲───╲0╱───
│ │ │
c: ───╲0╱───╱1╲───╲0╱───╱1╲───╲0╱───╱1╲───
│ │ │
d: ───╱1╲───╲0╱───╱1╲───╲0╱───╱1╲───╲0╱───
│ │ │
e: ───╲0╱───╱1╲───╲0╱───╱1╲───╲0╱───╱1╲───
│ │ │
f: ───╱1╲─────────╱1╲─────────╱1╲─────────
""".strip()
ct.assert_has_diagram(swap_network, expected_text_diagram)
def test_swap_network_repr(part_lens, acquaintance_size):
gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
ct.assert_equivalent_repr(gate)
def test_swap_network_init_error():
with pytest.raises(ValueError):
cca.SwapNetworkGate(())
with pytest.raises(ValueError):
cca.SwapNetworkGate((3, ))
def test_swap_network_gate_permutation(part_lens, acquaintance_size):
n_qubits = sum(part_lens)
swap_network_gate = cca.SwapNetworkGate(part_lens, acquaintance_size)
cca.testing.assert_permutation_decomposition_equivalence(
swap_network_gate, n_qubits)
def test_swap_network_permutation_error():
gate = cca.SwapNetworkGate((1, 1))
with pytest.raises(ValueError):
gate.permutation(1)
