def setUp(self):
super().setUp()
self.seed = 50
algorithm_globals.random_seed = self.seed
self.h2_op = (-1.052373245772859 * (I ^ I) + 0.39793742484318045 *
(I ^ Z) - 0.39793742484318045 * (Z ^ I) -
0.01128010425623538 * (Z ^ Z) + 0.18093119978423156 *
(X ^ X))
self.h2_energy = -1.85727503
self.h2_energy_excited = [-1.85727503, -1.24458455]
self.test_op = MatrixOp(np.diagflat([3, 5, -1, 0.8, 0.2, 2, 1,
-3])).to_pauli_op()
self.test_results = [-3, -1]
self.ryrz_wavefunction = TwoLocal(rotation_blocks=["ry", "rz"],
entanglement_blocks="cz",
reps=1)
self.ry_wavefunction = TwoLocal(rotation_blocks="ry",
entanglement_blocks="cz")
self.qasm_simulator = QuantumInstance(
BasicAer.get_backend("qasm_simulator"),
shots=2048,
seed_simulator=self.seed,
seed_transpiler=self.seed,
)
self.statevector_simulator = QuantumInstance(
BasicAer.get_backend("statevector_simulator"),
shots=1,
seed_simulator=self.seed,
seed_transpiler=self.seed,
)
def test_application(self):
"""Test an end-to-end application."""
bounds = np.array([0., 7.])
num_qubits = 3
# the distribution circuit is a normal distribution plus a QGAN-trained ansatz circuit
dist = NormalDistribution(num_qubits, mu=1, sigma=1, bounds=bounds)
ansatz = TwoLocal(num_qubits, 'ry', 'cz', reps=1, entanglement='circular')
trained_params = [0.29399714, 0.38853322, 0.9557694, 0.07245791, 6.02626428, 0.13537225]
ansatz.assign_parameters(trained_params, inplace=True)
dist.compose(ansatz, inplace=True)
# create the European call expected value
strike_price = 2
rescaling_factor = 0.25
european_call = EuropeanCallExpectedValue(num_qubits, strike_price, rescaling_factor,
bounds)
# create the state preparation circuit
state_preparation = european_call.compose(dist, front=True)
iae = IterativeAmplitudeEstimation(0.01, 0.05, state_preparation=state_preparation,
objective_qubits=[num_qubits],
post_processing=european_call.post_processing)
backend = QuantumInstance(Aer.get_backend('qasm_simulator'),
seed_simulator=125, seed_transpiler=80)
result = iae.run(backend)
self.assertAlmostEqual(result.estimation, 1.0364776997977694)
def setUp(self):
super().setUp()
self.seed = 50
aqua_globals.random_seed = self.seed
self.h2_op = -1.052373245772859 * (I ^ I) \
+ 0.39793742484318045 * (I ^ Z) \
- 0.39793742484318045 * (Z ^ I) \
- 0.01128010425623538 * (Z ^ Z) \
+ 0.18093119978423156 * (X ^ X)
self.h2_energy = -1.85727503
self.ryrz_wavefunction = TwoLocal(rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz')
self.ry_wavefunction = TwoLocal(rotation_blocks='ry',
entanglement_blocks='cz')
self.qasm_simulator = QuantumInstance(
BasicAer.get_backend('qasm_simulator'),
shots=1024,
seed_simulator=self.seed,
seed_transpiler=self.seed)
self.statevector_simulator = QuantumInstance(
BasicAer.get_backend('statevector_simulator'),
shots=1,
seed_simulator=self.seed,
seed_transpiler=self.seed)
def setUp(self):
super().setUp()
self.seed = 50
algorithm_globals.random_seed = self.seed
self.h2_op = (-1.052373245772859 * (I ^ I) + 0.39793742484318045 *
(I ^ Z) - 0.39793742484318045 * (Z ^ I) -
0.01128010425623538 * (Z ^ Z) + 0.18093119978423156 *
(X ^ X))
self.h2_energy = -1.85727503
self.ryrz_wavefunction = TwoLocal(rotation_blocks=["ry", "rz"],
entanglement_blocks="cz")
self.ry_wavefunction = TwoLocal(rotation_blocks="ry",
entanglement_blocks="cz")
self.qasm_simulator = QuantumInstance(
BasicAer.get_backend("qasm_simulator"),
shots=1024,
seed_simulator=self.seed,
seed_transpiler=self.seed,
)
self.statevector_simulator = QuantumInstance(
BasicAer.get_backend("statevector_simulator"),
shots=1,
seed_simulator=self.seed,
seed_transpiler=self.seed,
)
def test_compose_no_clbits_in_one_inplace(self):
"""Test combining a circuit with cregs to one without inplace"""
ansatz = TwoLocal(2, rotation_blocks="ry", entanglement_blocks="cx")
qc = QuantumCircuit(2)
qc.measure_all()
ansatz.compose(qc, inplace=True)
self.assertEqual(ansatz.clbits, qc.clbits)
def setUp(self):
super().setUp()
self.seed = 50
aqua_globals.random_seed = self.seed
pauli_dict = {
'paulis': [{
"coeff": {
"imag": 0.0,
"real": -1.052373245772859
},
"label": "II"
}, {
"coeff": {
"imag": 0.0,
"real": 0.39793742484318045
},
"label": "IZ"
}, {
"coeff": {
"imag": 0.0,
"real": -0.39793742484318045
},
"label": "ZI"
}, {
"coeff": {
"imag": 0.0,
"real": -0.01128010425623538
},
"label": "ZZ"
}, {
"coeff": {
"imag": 0.0,
"real": 0.18093119978423156
},
"label": "XX"
}]
}
self.qubit_op = WeightedPauliOperator.from_dict(pauli_dict).to_opflow()
num_qubits = self.qubit_op.num_qubits
ansatz = TwoLocal(num_qubits,
rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz')
warnings.filterwarnings('ignore', category=DeprecationWarning)
self.ryrz_wavefunction = {
'wrapped': RYRZ(num_qubits),
'circuit': QuantumCircuit(num_qubits).compose(ansatz),
'library': ansatz
}
ansatz = ansatz.copy()
ansatz.rotation_blocks = 'ry'
self.ry_wavefunction = {
'wrapped': RY(num_qubits),
'circuit': QuantumCircuit(num_qubits).compose(ansatz),
'library': ansatz
}
warnings.filterwarnings('always', category=DeprecationWarning)
def test_compose_no_clbits_in_one_multireg(self):
"""Test combining a circuit with cregs to one without, multi cregs"""
ansatz = TwoLocal(2, rotation_blocks="ry", entanglement_blocks="cx")
qa = QuantumRegister(2, "q")
ca = ClassicalRegister(2, "a")
cb = ClassicalRegister(2, "b")
qc = QuantumCircuit(qa, ca, cb)
qc.measure(0, cb[1])
out = ansatz.compose(qc)
self.assertEqual(out.clbits, qc.clbits)
self.assertEqual(out.cregs, qc.cregs)
def test_parameters_settable_is_constant(self):
"""Test the attribute num_parameters_settable does not change on parameter change."""
two = TwoLocal(3, rotation_blocks='rx', entanglement='cz', reps=2)
ordered_params = two.ordered_parameters
x = Parameter('x')
two.assign_parameters(dict(zip(ordered_params, [x] * two.num_parameters)), inplace=True)
with self.subTest(msg='num_parameters collapsed to 1'):
self.assertEqual(two.num_parameters, 1)
with self.subTest(msg='num_parameters_settable remained constant'):
self.assertEqual(two.num_parameters_settable, len(ordered_params))
def test_composing_two(self):
"""Test adding two two-local circuits."""
entangler_map = [[0, 3], [0, 2]]
two = TwoLocal(4, [], 'cry', entangler_map, reps=1)
circuit = two.compose(two)
reference = QuantumCircuit(4)
params = two.ordered_parameters
for _ in range(2):
reference.cry(params[0], 0, 3)
reference.cry(params[1], 0, 2)
self.assertCircuitEqual(reference, circuit)
def test_circular_on_same_block_and_circuit_size(self):
"""Test circular entanglement works correctly if the circuit and block sizes match."""
two = TwoLocal(2, 'ry', 'cx', entanglement='circular', reps=1)
parameters = np.arange(two.num_parameters)
ref = QuantumCircuit(2)
ref.ry(parameters[0], 0)
ref.ry(parameters[1], 1)
ref.cx(0, 1)
ref.ry(parameters[2], 0)
ref.ry(parameters[3], 1)
self.assertCircuitEqual(two.assign_parameters(parameters), ref)
def test_application(self):
"""Test an end-to-end application."""
from qiskit import Aer
bounds = np.array([0.0, 7.0])
num_qubits = 3
# the distribution circuit is a normal distribution plus a QGAN-trained ansatz circuit
dist = NormalDistribution(num_qubits, mu=1, sigma=1, bounds=bounds)
ansatz = TwoLocal(num_qubits, "ry", "cz", reps=1, entanglement="circular")
trained_params = [
0.29399714,
0.38853322,
0.9557694,
0.07245791,
6.02626428,
0.13537225,
]
ansatz.assign_parameters(trained_params, inplace=True)
dist.compose(ansatz, inplace=True)
# create the European call expected value
strike_price = 2
rescaling_factor = 0.25
european_call = EuropeanCallPricingObjective(
num_state_qubits=num_qubits,
strike_price=strike_price,
rescaling_factor=rescaling_factor,
bounds=bounds,
)
# create the state preparation circuit
state_preparation = european_call.compose(dist, front=True)
problem = EstimationProblem(
state_preparation=state_preparation,
objective_qubits=[num_qubits],
post_processing=european_call.post_processing,
)
q_i = QuantumInstance(
Aer.get_backend("aer_simulator"), seed_simulator=125, seed_transpiler=80
)
iae = IterativeAmplitudeEstimation(epsilon_target=0.01, alpha=0.05, quantum_instance=q_i)
result = iae.estimate(problem)
self.assertAlmostEqual(result.estimation_processed, 1.0364776997977694)
def test_reuse(self):
"""Test re-using a VQE algorithm instance."""
vqe = VQE()
with self.subTest(msg='assert running empty raises AlgorithmError'):
with self.assertRaises(AlgorithmError):
_ = vqe.run()
var_form = TwoLocal(rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz')
vqe.var_form = var_form
with self.subTest(msg='assert missing operator raises AlgorithmError'):
with self.assertRaises(AlgorithmError):
_ = vqe.run()
vqe.operator = self.h2_op
with self.subTest(msg='assert missing backend raises AlgorithmError'):
with self.assertRaises(AlgorithmError):
_ = vqe.run()
vqe.quantum_instance = self.statevector_simulator
with self.subTest(msg='assert VQE works once all info is available'):
result = vqe.run()
self.assertAlmostEqual(result.eigenvalue.real,
self.h2_energy,
places=5)
operator = PrimitiveOp(
np.array([[1, 0, 0, 0], [0, -1, 0, 0], [0, 0, 2, 0], [0, 0, 0,
3]]))
with self.subTest(msg='assert minimum eigensolver interface works'):
result = vqe.compute_minimum_eigenvalue(operator)
self.assertAlmostEqual(result.eigenvalue.real, -1.0, places=5)
def test_compose_inplace_to_circuit(self):
"""Test adding a two-local to an existing circuit."""
two = TwoLocal(3, ["ry", "rz"],
"cz",
"full",
reps=1,
insert_barriers=True)
circuit = QuantumCircuit(3)
circuit.compose(two, inplace=True)
reference = QuantumCircuit(3)
param_iter = iter(two.ordered_parameters)
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
reference.barrier()
reference.cz(0, 1)
reference.cz(0, 2)
reference.cz(1, 2)
reference.barrier()
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
self.assertCircuitEqual(circuit, reference)
def test_skip_final_rotation_layer(self):
"""Test skipping the final rotation layer works."""
two = TwoLocal(3, ["ry", "h"], ["cz", "cx"],
reps=2,
skip_final_rotation_layer=True)
self.assertEqual(two.num_parameters,
6) # would be 9 with a final rotation layer
def test_set_packing_vqe(self):
""" set packing vqe test """
try:
# pylint: disable=import-outside-toplevel
from qiskit import Aer
except Exception as ex: # pylint: disable=broad-except
self.skipTest(
"Aer doesn't appear to be installed. Error: '{}'".format(
str(ex)))
return
wavefunction = TwoLocal(rotation_blocks='ry',
entanglement_blocks='cz',
reps=3,
entanglement='linear')
q_i = QuantumInstance(Aer.get_backend('qasm_simulator'),
seed_simulator=aqua_globals.random_seed,
seed_transpiler=aqua_globals.random_seed)
result = VQE(wavefunction,
SPSA(maxiter=200),
max_evals_grouped=2,
quantum_instance=q_i).compute_minimum_eigenvalue(
operator=self.qubit_op)
x = sample_most_likely(result.eigenstate)
ising_sol = set_packing.get_solution(x)
oracle = self._brute_force()
self.assertEqual(np.count_nonzero(ising_sol), oracle)
def test_compose_inplace_to_circuit(self):
"""Test adding a two-local to an existing circuit."""
two = TwoLocal(3, ["ry", "rz"],
"cz",
"full",
reps=1,
insert_barriers=True)
circuit = QuantumCircuit(3)
circuit.compose(two, inplace=True)
# ┌──────────┐┌──────────┐ ░ ░ ┌──────────┐ ┌──────────┐
# q_0: ┤ Ry(θ[0]) ├┤ Rz(θ[3]) ├─░──■──■─────░─┤ Ry(θ[6]) ├─┤ Rz(θ[9]) ├
# ├──────────┤├──────────┤ ░ │ │ ░ ├──────────┤┌┴──────────┤
# q_1: ┤ Ry(θ[1]) ├┤ Rz(θ[4]) ├─░──■──┼──■──░─┤ Ry(θ[7]) ├┤ Rz(θ[10]) ├
# ├──────────┤├──────────┤ ░ │ │ ░ ├──────────┤├───────────┤
# q_2: ┤ Ry(θ[2]) ├┤ Rz(θ[5]) ├─░─────■──■──░─┤ Ry(θ[8]) ├┤ Rz(θ[11]) ├
# └──────────┘└──────────┘ ░ ░ └──────────┘└───────────┘
reference = QuantumCircuit(3)
param_iter = iter(two.ordered_parameters)
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
reference.barrier()
reference.cz(0, 1)
reference.cz(0, 2)
reference.cz(1, 2)
reference.barrier()
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
self.assertCircuitEqual(circuit.decompose(), reference)
def test_batch_evaluate_with_qnspsa(self):
"""Test batch evaluating with QNSPSA works."""
ansatz = TwoLocal(2,
rotation_blocks=["ry", "rz"],
entanglement_blocks="cz")
wrapped_backend = BasicAer.get_backend("qasm_simulator")
inner_backend = BasicAer.get_backend("statevector_simulator")
callcount = {"count": 0}
def wrapped_run(circuits, **kwargs):
kwargs["callcount"]["count"] += 1
return inner_backend.run(circuits)
wrapped_backend.run = partial(wrapped_run, callcount=callcount)
fidelity = QNSPSA.get_fidelity(ansatz, backend=wrapped_backend)
qnspsa = QNSPSA(fidelity, maxiter=5)
vqe = VQE(
ansatz=ansatz,
optimizer=qnspsa,
max_evals_grouped=100,
quantum_instance=wrapped_backend,
)
_ = vqe.compute_minimum_eigenvalue(Z ^ Z)
# 1 calibration + 1 stddev estimation + 1 initial blocking
# + 5 (1 loss + 1 fidelity + 1 blocking) + 1 return loss + 1 VQE eval
expected = 1 + 1 + 1 + 5 * 3 + 1 + 1
self.assertEqual(callcount["count"], expected)
def test_reuse(self):
"""Test re-using a VQE algorithm instance."""
vqe = VQE()
with self.subTest(msg="assert running empty raises AlgorithmError"):
with self.assertRaises(AlgorithmError):
_ = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
ansatz = TwoLocal(rotation_blocks=["ry", "rz"],
entanglement_blocks="cz")
vqe.ansatz = ansatz
with self.subTest(msg="assert missing operator raises AlgorithmError"):
with self.assertRaises(AlgorithmError):
_ = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
vqe.expectation = MatrixExpectation()
vqe.quantum_instance = self.statevector_simulator
with self.subTest(msg="assert VQE works once all info is available"):
result = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
self.assertAlmostEqual(result.eigenvalue.real,
self.h2_energy,
places=5)
operator = PrimitiveOp(
np.array([[1, 0, 0, 0], [0, -1, 0, 0], [0, 0, 2, 0], [0, 0, 0,
3]]))
with self.subTest(msg="assert minimum eigensolver interface works"):
result = vqe.compute_minimum_eigenvalue(operator=operator)
self.assertAlmostEqual(result.eigenvalue.real, -1.0, places=5)
def test_vqe_reuse(self):
""" Test vqe reuse """
vqe = VQE()
with self.assertRaises(AquaError):
_ = vqe.run()
var_form = TwoLocal(rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz')
vqe.var_form = var_form
with self.assertRaises(AquaError):
_ = vqe.run()
vqe.operator = self.qubit_op
with self.assertRaises(AquaError):
_ = vqe.run()
qinst = QuantumInstance(BasicAer.get_backend('statevector_simulator'))
vqe.quantum_instance = qinst
result = vqe.run()
self.assertAlmostEqual(result.eigenvalue.real, -1.85727503, places=5)
operator = PrimitiveOp(
np.array([[1, 0, 0, 0], [0, -1, 0, 0], [0, 0, 2, 0], [0, 0, 0,
3]]))
vqe.operator = operator
result = vqe.run()
self.assertAlmostEqual(result.eigenvalue.real, -1.0, places=5)
def test_samples_vqe(self, simulator):
"""Test samples for VQE"""
# test minimize
algorithm_globals.random_seed = 1
quantum_instance = self.sv_simulator if simulator == "sv" else self.qasm_simulator
opt_sol = -2
success = OptimizationResultStatus.SUCCESS
optimizer = SPSA(maxiter=100)
ry_ansatz = TwoLocal(5, "ry", "cz", reps=3, entanglement="full")
vqe_mes = VQE(ry_ansatz, optimizer=optimizer, quantum_instance=quantum_instance)
vqe = MinimumEigenOptimizer(vqe_mes)
results = vqe.solve(self.op_ordering)
self.assertEqual(results.fval, opt_sol)
np.testing.assert_array_almost_equal(results.x, [0, 1])
self.assertEqual(results.status, success)
results.raw_samples.sort(key=lambda x: x.probability, reverse=True)
np.testing.assert_array_almost_equal(results.x, results.raw_samples[0].x)
self.assertAlmostEqual(sum(s.probability for s in results.samples), 1, delta=1e-5)
self.assertAlmostEqual(sum(s.probability for s in results.raw_samples), 1, delta=1e-5)
self.assertAlmostEqual(min(s.fval for s in results.samples), -2)
self.assertAlmostEqual(min(s.fval for s in results.samples if s.status == success), opt_sol)
self.assertAlmostEqual(min(s.fval for s in results.raw_samples), opt_sol)
for sample in results.raw_samples:
self.assertEqual(sample.status, success)
np.testing.assert_array_almost_equal(results.samples[0].x, [0, 1])
self.assertAlmostEqual(results.samples[0].fval, opt_sol)
self.assertEqual(results.samples[0].status, success)
np.testing.assert_array_almost_equal(results.raw_samples[0].x, [0, 1])
self.assertAlmostEqual(results.raw_samples[0].fval, opt_sol)
self.assertEqual(results.raw_samples[0].status, success)
def test_runtime(self, subroutine):
"""Test vqe and qaoa runtime"""
optimizer = {"name": "SPSA", "maxiter": 100}
backend = QasmSimulatorPy()
if subroutine == "vqe":
ry_ansatz = TwoLocal(5, "ry", "cz", reps=3, entanglement="full")
initial_point = np.random.default_rng(42).random(
ry_ansatz.num_parameters)
solver = VQEProgram(
ansatz=ry_ansatz,
optimizer=optimizer,
initial_point=initial_point,
backend=backend,
provider=FakeVQERuntimeProvider(),
)
else:
reps = 2
initial_point = np.random.default_rng(42).random(2 * reps)
solver = QAOAProgram(
optimizer=optimizer,
reps=reps,
initial_point=initial_point,
backend=backend,
provider=FakeQAOARuntimeProvider(),
)
opt = MinimumEigenOptimizer(solver)
result = opt.solve(self.op_ordering)
self.assertIsInstance(result, MinimumEigenOptimizationResult)
def test_backend_change(self, user_expectation):
"""Test that VQE works when backend changes."""
vqe = VQE(
operator=self.h2_op,
var_form=TwoLocal(rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz'),
optimizer=SLSQP(maxiter=2),
expectation=user_expectation,
quantum_instance=BasicAer.get_backend('statevector_simulator'))
result0 = vqe.run()
if user_expectation is not None:
with self.subTest('User expectation kept.'):
self.assertEqual(vqe.expectation, user_expectation)
else:
with self.subTest('Expectation created.'):
self.assertIsInstance(vqe.expectation, ExpectationBase)
try:
vqe.set_backend(BasicAer.get_backend('qasm_simulator'))
except Exception as ex: # pylint: disable=broad-except
self.fail("Failed to change backend. Error: '{}'".format(str(ex)))
return
result1 = vqe.run()
if user_expectation is not None:
with self.subTest(
'Change backend with user expectation, it is kept.'):
self.assertEqual(vqe.expectation, user_expectation)
else:
with self.subTest(
'Change backend without user expectation, one created.'):
self.assertIsInstance(vqe.expectation, ExpectationBase)
with self.subTest('Check results.'):
self.assertEqual(len(result0.optimal_point),
len(result1.optimal_point))
def test_iadd_to_circuit(self):
"""Test adding a two-local to an existing circuit."""
two = TwoLocal(3, ['ry', 'rz'],
'cz',
'full',
reps=1,
insert_barriers=True)
circuit = QuantumCircuit(3)
circuit += two
reference = QuantumCircuit(3)
param_iter = iter(two.ordered_parameters)
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
reference.barrier()
reference.cz(0, 1)
reference.cz(0, 2)
reference.cz(1, 2)
reference.barrier()
for i in range(3):
reference.ry(next(param_iter), i)
for i in range(3):
reference.rz(next(param_iter), i)
self.assertCircuitEqual(circuit, reference)
def test_backend_change(self, user_expectation):
"""Test that VQE works when backend changes."""
vqe = VQE(
ansatz=TwoLocal(rotation_blocks=["ry", "rz"],
entanglement_blocks="cz"),
optimizer=SLSQP(maxiter=2),
expectation=user_expectation,
quantum_instance=BasicAer.get_backend("statevector_simulator"),
)
result0 = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
if user_expectation is not None:
with self.subTest("User expectation kept."):
self.assertEqual(vqe.expectation, user_expectation)
vqe.quantum_instance = BasicAer.get_backend("qasm_simulator")
# works also if no expectation is set, since it will be determined automatically
result1 = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
if user_expectation is not None:
with self.subTest(
"Change backend with user expectation, it is kept."):
self.assertEqual(vqe.expectation, user_expectation)
with self.subTest("Check results."):
self.assertEqual(len(result0.optimal_point),
len(result1.optimal_point))
def test_vqe_2_iqpe(self):
""" vqe to iqpe test """
backend = BasicAer.get_backend('qasm_simulator')
num_qbits = self.qubit_op.num_qubits
wavefunction = TwoLocal(num_qbits, ['ry', 'rz'],
'cz',
reps=3,
insert_barriers=True)
optimizer = SPSA(maxiter=10)
algo = VQE(self.qubit_op, wavefunction, optimizer)
quantum_instance = QuantumInstance(backend,
seed_simulator=self.seed,
seed_transpiler=self.seed)
result = algo.run(quantum_instance)
self.log.debug('VQE result: %s.', result)
ref_eigenval = -1.85727503 # Known reference value
num_time_slices = 1
num_iterations = 6
param_dict = result.optimal_parameters
state_in = VarFormBased(wavefunction, param_dict)
iqpe = IQPE(self.qubit_op,
state_in,
num_time_slices,
num_iterations,
expansion_mode='suzuki',
expansion_order=2,
shallow_circuit_concat=True)
quantum_instance = QuantumInstance(backend,
shots=100,
seed_transpiler=self.seed,
seed_simulator=self.seed)
result = iqpe.run(quantum_instance)
self.log.debug('top result str label: %s',
result.top_measurement_label)
self.log.debug('top result in decimal: %s',
result.top_measurement_decimal)
self.log.debug('stretch: %s', result.stretch)
self.log.debug('translation: %s', result.translation)
self.log.debug('final eigenvalue from QPE: %s', result.eigenvalue)
self.log.debug('reference eigenvalue: %s', ref_eigenval)
self.log.debug('ref eigenvalue (transformed): %s',
(ref_eigenval + result.translation) * result.stretch)
self.log.debug(
'reference binary str label: %s',
decimal_to_binary(
(ref_eigenval.real + result.translation) * result.stretch,
max_num_digits=num_iterations + 3,
fractional_part_only=True))
self.assertAlmostEqual(result.eigenvalue.real,
ref_eigenval.real,
delta=1e-2)
def test_raw_feature_vector_on_wine(self, mode):
"""Test VQE on the wine dataset using the ``RawFeatureVector`` as data preparation."""
feature_dim = 4 # dimension of each data point
training_dataset_size = 8
testing_dataset_size = 4
_, training_input, test_input, _ = wine(
training_size=training_dataset_size,
test_size=testing_dataset_size,
n=feature_dim,
plot_data=False)
if mode == 'component':
warnings.filterwarnings('ignore', category=DeprecationWarning)
feature_map = LegacyRawFeatureVector(feature_dimension=feature_dim)
else:
feature_map = RawFeatureVector(feature_dimension=feature_dim)
vqc = VQC(COBYLA(maxiter=100), feature_map,
TwoLocal(feature_map.num_qubits, ['ry', 'rz'], 'cz', reps=3),
training_input, test_input)
result = vqc.run(self.statevector_simulator)
if mode == 'component':
warnings.filterwarnings('always', category=DeprecationWarning)
self.log.debug(result['testing_accuracy'])
self.assertGreater(result['testing_accuracy'], 0.7)
def test_vqc_minibatching_with_gradient_support(self, mode):
""" vqc minibatching with gradient support test """
n_dim = 2 # dimension of each data point
seed = 1024
aqua_globals.random_seed = seed
_, training_input, test_input, _ = ad_hoc_data(training_size=4,
test_size=2,
n=n_dim,
gap=0.3,
plot_data=False)
backend = BasicAer.get_backend('statevector_simulator')
optimizer = L_BFGS_B(maxfun=30)
# set up data encoding circuit
data_preparation = self.data_preparation[mode]
# set up wavefunction
if mode == 'wrapped':
warnings.filterwarnings('ignore', category=DeprecationWarning)
wavefunction = RYRZ(2, depth=1)
else:
wavefunction = TwoLocal(2, ['ry', 'rz'],
'cz',
reps=1,
insert_barriers=True)
theta = ParameterVector('theta', wavefunction.num_parameters)
resorted = []
for i in range(4):
layer = wavefunction.ordered_parameters[4 * i:4 * (i + 1)]
resorted += layer[::2]
resorted += layer[1::2]
wavefunction.assign_parameters(dict(zip(resorted, theta)),
inplace=True)
if mode == 'circuit':
wavefunction = QuantumCircuit(2).compose(wavefunction)
# set up algorithm
vqc = VQC(optimizer,
data_preparation,
wavefunction,
training_input,
test_input,
minibatch_size=2)
if mode in ['circuit', 'library']:
vqc._feature_map_params = self._sorted_data_params
vqc._var_form_params = list(theta)
else:
warnings.filterwarnings('always', category=DeprecationWarning)
quantum_instance = QuantumInstance(backend,
seed_simulator=seed,
seed_transpiler=seed)
result = vqc.run(quantum_instance)
vqc_accuracy = 0.5
self.log.debug(result['testing_accuracy'])
self.assertAlmostEqual(result['testing_accuracy'],
vqc_accuracy,
places=3)
def test_minibatching_gradient_based(self):
"""Test the minibatching option with a gradient-based optimizer."""
n_dim = 2 # dimension of each data point
_, training_input, test_input, _ = ad_hoc_data(training_size=4,
test_size=2,
n=n_dim,
gap=0.3,
plot_data=False)
optimizer = L_BFGS_B(maxfun=30)
data_preparation = self.data_preparation
wavefunction = TwoLocal(2, ['ry', 'rz'],
'cz',
reps=1,
insert_barriers=True)
vqc = VQC(optimizer,
data_preparation,
wavefunction,
training_input,
test_input,
minibatch_size=2)
result = vqc.run(self.statevector_simulator)
self.log.debug(result['testing_accuracy'])
self.assertAlmostEqual(result['testing_accuracy'], 0.75, places=3)
def test_backend_change(self, user_expectation):
"""Test that VQE works when backend changes."""
vqe = VQE(
ansatz=TwoLocal(rotation_blocks=["ry", "rz"],
entanglement_blocks="cz"),
optimizer=SLSQP(maxiter=2),
expectation=user_expectation,
quantum_instance=BasicAer.get_backend("statevector_simulator"),
)
result0 = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
if user_expectation is not None:
with self.subTest("User expectation kept."):
self.assertEqual(vqe.expectation, user_expectation)
else:
with self.subTest("Expectation created."):
self.assertIsInstance(vqe.expectation, ExpectationBase)
try:
vqe.quantum_instance = BasicAer.get_backend("qasm_simulator")
except Exception as ex: # pylint: disable=broad-except
self.fail("Failed to change backend. Error: '{}'".format(str(ex)))
return
result1 = vqe.compute_minimum_eigenvalue(operator=self.h2_op)
if user_expectation is not None:
with self.subTest(
"Change backend with user expectation, it is kept."):
self.assertEqual(vqe.expectation, user_expectation)
else:
with self.subTest(
"Change backend without user expectation, one created."):
self.assertIsInstance(vqe.expectation, ExpectationBase)
with self.subTest("Check results."):
self.assertEqual(len(result0.optimal_point),
len(result1.optimal_point))
def test_vqe_mes(self):
""" Test vqe minimum eigen solver interface """
ansatz = TwoLocal(rotation_blocks=['ry', 'rz'],
entanglement_blocks='cz')
vqe = VQE(var_form=ansatz, optimizer=COBYLA())
vqe.set_backend(BasicAer.get_backend('statevector_simulator'))
result = vqe.compute_minimum_eigenvalue(self.qubit_op)
self.assertAlmostEqual(result.eigenvalue.real, -1.85727503, places=5)