def test_mlae_circuits(self, efficient_circuit): """ Test the circuits constructed for MLAE """ prob = 0.5 for k in range(1, 7): warnings.filterwarnings('ignore', category=DeprecationWarning) qae = MaximumLikelihoodAmplitudeEstimation( k, a_factory=BernoulliAFactory(prob)) angle = 2 * np.arcsin(np.sqrt(prob)) # compute all the circuits used for MLAE circuits = [] # 0th power q_objective = QuantumRegister(1, 'q') circuit = QuantumCircuit(q_objective) circuit.ry(angle, q_objective) circuits += [circuit] # powers of 2 for power in range(k): q_objective = QuantumRegister(1, 'q') circuit = QuantumCircuit(q_objective) # A operator circuit.ry(angle, q_objective) # Q^(2^j) operator if efficient_circuit: qae.q_factory = BernoulliQFactory(qae.a_factory) circuit.ry(2 * 2**power * angle, q_objective[0]) else: q_factory = QFactory(qae.a_factory, i_objective=0) for _ in range(2**power): q_factory.build(circuit, q_objective) warnings.filterwarnings('always', category=DeprecationWarning) actual_circuits = qae.construct_circuits(measurement=False) for actual, expected in zip(actual_circuits, circuits): expected_unitary = self._unitary.execute( expected).get_unitary() actual_unitary = self._unitary.execute(actual).get_unitary() diff = np.sum(np.abs(actual_unitary - expected_unitary)) self.assertAlmostEqual(diff, 0)
def test_iqae_circuits(self, efficient_circuit): """Test circuits resulting from iterative amplitude estimation. Build the circuit manually and from the algorithm and compare the resulting unitaries. """ prob = 0.5 for k in range(2, 7): warnings.filterwarnings('ignore', category=DeprecationWarning) qae = IterativeAmplitudeEstimation( 0.01, 0.05, a_factory=BernoulliAFactory(prob)) angle = 2 * np.arcsin(np.sqrt(prob)) # manually set up the inefficient AE circuit q_objective = QuantumRegister(1, 'q') circuit = QuantumCircuit(q_objective) # A operator circuit.ry(angle, q_objective) if efficient_circuit: qae.q_factory = BernoulliQFactory(qae.a_factory) # for power in range(k): # circuit.ry(2 ** power * angle, q_objective[0]) circuit.ry(2 * k * angle, q_objective[0]) else: q_factory = QFactory(qae.a_factory, i_objective=0) for _ in range(k): q_factory.build(circuit, q_objective) warnings.filterwarnings('always', category=DeprecationWarning) expected_unitary = self._unitary.execute(circuit).get_unitary() actual_circuit = qae.construct_circuit(k, measurement=False) actual_unitary = self._unitary.execute( actual_circuit).get_unitary() diff = np.sum(np.abs(actual_unitary - expected_unitary)) self.assertAlmostEqual(diff, 0)