def test_distributed_circuit_add_gate(backend):
# Attempt to add gate so that available global qubits are not enough
c = DistributedCircuit(2, {"/GPU:0": 2})
with pytest.raises(ValueError):
c.add(gates.SWAP(0, 1))
# Attempt adding noise channel
with pytest.raises(NotImplementedError):
c.add(gates.PauliNoiseChannel(0, px=0.1, pz=0.1))
def test_distributed_circuit_execution_special_gate(backend, accelerators):
dist_c = DistributedCircuit(6, accelerators)
initial_state = random_state(dist_c.nqubits)
dist_c.add(gates.Flatten(np.copy(initial_state)))
dist_c.add((gates.H(i) for i in range(dist_c.nlocal)))
dist_c.global_qubits = range(dist_c.nlocal, dist_c.nqubits)
c = Circuit(6)
c.add(gates.Flatten(np.copy(initial_state)))
c.add((gates.H(i) for i in range(dist_c.nlocal)))
np.testing.assert_allclose(dist_c(), c())
def test_distributed_circuit_set_gates(backend):
devices = {"/GPU:0": 2, "/GPU:1": 2}
c = DistributedCircuit(6, devices)
c.add((gates.H(i) for i in range(4)))
c.queues.set(c.queue)
check_device_queues(c.queues)
assert len(c.queues.queues) == 1
assert len(c.queues.queues[0]) == 4
for queues in c.queues.queues[0]:
assert len(queues) == 4
def test_distributed_circuit_execution_controlled_gate(backend, accelerators):
dist_c = DistributedCircuit(4, accelerators)
dist_c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
dist_c.add(gates.CNOT(0, 2))
c = Circuit(4)
c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
c.add(gates.CNOT(0, 2))
initial_state = random_state(c.nqubits)
final_state = dist_c(np.copy(initial_state))
target_state = c(np.copy(initial_state))
np.testing.assert_allclose(target_state, final_state)
def test_create_queue_errors(backend):
c = DistributedCircuit(4, {"/GPU:0": 2})
c.add(gates.H(0))
c.add(gates.H(1))
c.queues.qubits = DistributedQubits([0], c.nqubits)
with pytest.raises(ValueError):
c.queues.create(c.queue)
c = DistributedCircuit(4, {"/GPU:0": 4})
c.add(gates.SWAP(0, 1))
c.queues.qubits = DistributedQubits([0, 1], c.nqubits)
with pytest.raises(ValueError):
c.queues.create(c.queue)
def test_distributed_circuit_execution_with_swap(backend, accelerators):
dist_c = DistributedCircuit(6, accelerators)
dist_c.add((gates.H(i) for i in range(6)))
dist_c.add((gates.SWAP(i, i + 1) for i in range(5)))
dist_c.global_qubits = [0, 1]
c = Circuit(6)
c.add((gates.H(i) for i in range(6)))
c.add((gates.SWAP(i, i + 1) for i in range(5)))
initial_state = random_state(c.nqubits)
final_state = dist_c(np.copy(initial_state))
target_state = c(np.copy(initial_state))
np.testing.assert_allclose(target_state, final_state)
def test_transform_queue_more_gates(backend):
devices = {"/GPU:0": 2, "/GPU:1": 2}
c = DistributedCircuit(4, devices)
c.add(gates.H(0))
c.add(gates.H(1))
c.add(gates.CNOT(2, 3))
c.add(gates.CZ(0, 1))
c.add(gates.CNOT(3, 0))
c.add(gates.CNOT(1, 2))
c.queues.qubits = DistributedQubits([2, 3], c.nqubits)
tqueue = c.queues.transform(c.queue)
assert len(tqueue) == 10
assert isinstance(tqueue[0], gates.H)
assert tqueue[0].target_qubits == (0,)
assert isinstance(tqueue[1], gates.H)
assert tqueue[1].target_qubits == (1,)
assert isinstance(tqueue[2], gates.CZ)
assert tqueue[2].target_qubits == (1,)
assert isinstance(tqueue[3], gates.SWAP)
assert set(tqueue[3].target_qubits) == {1, 3}
assert isinstance(tqueue[4], gates.CNOT)
assert tqueue[4].target_qubits == (1,)
assert isinstance(tqueue[5], gates.CNOT)
assert tqueue[5].target_qubits == (0,)
assert isinstance(tqueue[6], gates.SWAP)
assert set(tqueue[6].target_qubits) == {0, 2}
assert isinstance(tqueue[7], gates.CNOT)
assert tqueue[7].target_qubits == (0,)
assert isinstance(tqueue[8], gates.SWAP)
assert set(tqueue[8].target_qubits) == {0, 2}
assert isinstance(tqueue[9], gates.SWAP)
assert set(tqueue[9].target_qubits) == {1, 3}
def test_distributed_circuit_execution(backend, accelerators,
use_global_qubits):
dist_c = DistributedCircuit(6, accelerators)
c = Circuit(6)
if use_global_qubits:
dist_c.add((gates.H(i) for i in range(dist_c.nqubits)))
c.add((gates.H(i) for i in range(dist_c.nqubits)))
else:
dist_c.add((gates.H(i) for i in range(dist_c.nlocal)))
c.add((gates.H(i) for i in range(dist_c.nlocal)))
dist_c.global_qubits = range(dist_c.nlocal, dist_c.nqubits)
initial_state = random_state(c.nqubits)
final_state = dist_c(np.copy(initial_state))
target_state = c(np.copy(initial_state))
np.testing.assert_allclose(target_state, final_state)
def test_transform_queue_simple(backend):
devices = {"/GPU:0": 1, "/GPU:1": 1}
c = DistributedCircuit(4, devices)
c.add((gates.H(i) for i in range(4)))
c.queues.qubits = DistributedQubits([0], c.nqubits)
tqueue = c.queues.transform(c.queue)
assert len(tqueue) == 6
for i in range(3):
assert isinstance(tqueue[i], gates.H)
assert tqueue[i].target_qubits == (i + 1,)
assert isinstance(tqueue[3], gates.SWAP)
assert tqueue[3].target_qubits == (0, 1)
assert isinstance(tqueue[4], gates.H)
assert tqueue[4].target_qubits == (1,)
assert isinstance(tqueue[5], gates.SWAP)
assert tqueue[5].target_qubits == (0, 1)
def test_distributed_circuit_set_gates(backend):
devices = {"/GPU:0": 2, "/GPU:1": 2}
c = DistributedCircuit(6, devices)
c.add((gates.H(i) for i in range(4)))
c.queues.set(c.queue)
check_device_queues(c.queues)
assert len(c.queues.queues) == 1
assert len(c.queues.queues[0]) == 4
for queues in c.queues.queues[0]:
assert len(queues) == 4
# Attempt to set gates before adding any gate
c = DistributedCircuit(6, devices)
with pytest.raises(RuntimeError):
c.queues.set(c.queue)
def test_distributed_circuit_set_gates_controlled(backend):
devices = {"/GPU:0": 2, "/GPU:1": 2}
c = DistributedCircuit(6, devices)
c.add([gates.H(0), gates.H(2), gates.H(3)])
c.add(gates.CNOT(4, 5))
c.add(gates.Z(1).controlled_by(0))
c.add(gates.SWAP(2, 3))
c.add([gates.X(2), gates.X(3), gates.X(4)])
c.queues.set(c.queue)
check_device_queues(c.queues)
assert len(c.queues.queues) == 7
for i, queue in enumerate(c.queues.queues[:-2]):
assert len(queue) == 4 * (1 - i % 2)
for device_group in c.queues.queues[0]:
assert len(device_group) == 7
for device_group in c.queues.queues[2]:
assert len(device_group) == 1
def test_distributed_circuit_execution_controlled_by_gates(
backend, accelerators):
dist_c = DistributedCircuit(6, accelerators)
dist_c.add([gates.H(0), gates.H(2), gates.H(3)])
dist_c.add(gates.CNOT(4, 5))
dist_c.add(gates.Z(1).controlled_by(0))
dist_c.add(gates.SWAP(2, 3))
dist_c.add([gates.X(2), gates.X(3), gates.X(4)])
c = Circuit(6)
c.add([gates.H(0), gates.H(2), gates.H(3)])
c.add(gates.CNOT(4, 5))
c.add(gates.Z(1).controlled_by(0))
c.add(gates.SWAP(2, 3))
c.add([gates.X(2), gates.X(3), gates.X(4)])
initial_state = random_state(c.nqubits)
final_state = dist_c(np.copy(initial_state))
target_state = c(np.copy(initial_state))
np.testing.assert_allclose(target_state, final_state)
def test_distributed_circuit_execution_pretransformed(backend, accelerators):
dist_c = DistributedCircuit(4, accelerators)
dist_c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
dist_c.add(gates.SWAP(0, 2))
dist_c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
c = Circuit(4)
c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
c.add(gates.SWAP(0, 2))
c.add((gates.H(i) for i in range(dist_c.nglobal, 4)))
initial_state = random_state(c.nqubits)
final_state = dist_c(np.copy(initial_state))
target_state = c(np.copy(initial_state))
K.assert_allclose(target_state, final_state, atol=1e-7)
def test_create_queue_with_global_swap(backend):
devices = {"/GPU:0": 2, "/GPU:1": 2}
c = DistributedCircuit(6, devices)
c.add([gates.H(0), gates.H(2), gates.H(3)])
c.add(gates.SWAP(3, 4))
c.add([gates.X(1), gates.X(2)])
c.queues.qubits = DistributedQubits([4, 5], c.nqubits)
c.queues.create(c.queues.transform(c.queue))
check_device_queues(c.queues)
assert len(c.queues.special_queue) == 1
assert len(c.queues.queues) == 3
assert len(c.queues.queues[0]) == 4
assert len(c.queues.queues[1]) == 0
assert len(c.queues.queues[2]) == 4
for device_group in c.queues.queues[0]:
assert len(device_group) == 3
for device_group in c.queues.queues[2]:
assert len(device_group) == 2
def test_distributed_circuit_execution_addition(backend, accelerators):
# Attempt to add circuits with different devices
c1 = DistributedCircuit(6, {"/GPU:0": 2, "/GPU:1": 2})
c2 = DistributedCircuit(6, {"/GPU:0": 2})
with pytest.raises(ValueError):
c = c1 + c2
c1 = DistributedCircuit(6, accelerators)
c2 = DistributedCircuit(6, accelerators)
c1.add([gates.H(i) for i in range(6)])
c2.add([gates.CNOT(i, i + 1) for i in range(5)])
c2.add([gates.Z(i) for i in range(6)])
dist_c = c1 + c2
c = Circuit(6)
c.add([gates.H(i) for i in range(6)])
c.add([gates.CNOT(i, i + 1) for i in range(5)])
c.add([gates.Z(i) for i in range(6)])
assert c.depth == dist_c.depth
np.testing.assert_allclose(dist_c(), c())
def test_distributed_circuit_fusion(backend, accelerators):
c = DistributedCircuit(4, accelerators)
c.add((gates.H(i) for i in range(4)))
with pytest.raises(NotImplementedError):
c.fuse()