mirror of https://github.com/Qiskit/qiskit.git
139 lines
4.7 KiB
Python
139 lines
4.7 KiB
Python
# This code is part of Qiskit.
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#
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# (C) Copyright IBM 2023, 2024.
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#
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# This code is licensed under the Apache License, Version 2.0. You may
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# obtain a copy of this license in the LICENSE.txt file in the root directory
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# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
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#
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# Any modifications or derivative works of this code must retain this
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# copyright notice, and modified files need to carry a notice indicating
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# that they have been altered from the originals.
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"""Test the NormalizeRXAngle pass"""
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import unittest
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import numpy as np
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from ddt import ddt, named_data
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from qiskit import QuantumCircuit
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from qiskit.transpiler.passes.optimization.normalize_rx_angle import (
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NormalizeRXAngle,
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)
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from qiskit.providers.fake_provider import GenericBackendV2
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from qiskit.transpiler import Target
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from qiskit.circuit.library.standard_gates import SXGate
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from test import QiskitTestCase # pylint: disable=wrong-import-order
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@ddt
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class TestNormalizeRXAngle(QiskitTestCase):
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"""Tests the NormalizeRXAngle pass."""
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def test_not_convert_to_x_if_no_calib_in_target(self):
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"""Check that RX(pi) is NOT converted to X,
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if X calibration is not present in the target"""
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empty_target = Target()
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tp = NormalizeRXAngle(target=empty_target)
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qc = QuantumCircuit(1)
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qc.rx(90, 0)
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transpiled_circ = tp(qc)
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self.assertEqual(transpiled_circ.count_ops().get("x", 0), 0)
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def test_sx_conversion_works(self):
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"""Check that RX(pi/2) is converted to SX,
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if SX calibration is present in the target"""
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target = Target()
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target.add_instruction(SXGate(), properties={(0,): None})
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tp = NormalizeRXAngle(target=target)
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qc = QuantumCircuit(1)
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qc.rx(np.pi / 2, 0)
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transpiled_circ = tp(qc)
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self.assertEqual(transpiled_circ.count_ops().get("sx", 0), 1)
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def test_rz_added_for_negative_rotation_angles(self):
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"""Check that RZ is added before and after RX,
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if RX rotation angle is negative"""
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backend = GenericBackendV2(num_qubits=5)
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tp = NormalizeRXAngle(target=backend.target)
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# circuit to transpile and test
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qc = QuantumCircuit(1)
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qc.rx((-1 / 3) * np.pi, 0)
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transpiled_circ = tp(qc)
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# circuit to show the correct answer
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qc_ref = QuantumCircuit(1)
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qc_ref.rz(np.pi, 0)
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qc_ref.rx(np.pi / 3, 0)
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qc_ref.rz(-np.pi, 0)
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self.assertQuantumCircuitEqual(transpiled_circ, qc_ref)
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@named_data(
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{"name": "-0.3pi", "raw_theta": -0.3 * np.pi, "correct_wrapped_theta": 0.3 * np.pi},
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{"name": "1.7pi", "raw_theta": 1.7 * np.pi, "correct_wrapped_theta": 0.3 * np.pi},
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{"name": "2.2pi", "raw_theta": 2.2 * np.pi, "correct_wrapped_theta": 0.2 * np.pi},
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)
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def test_angle_wrapping_works(self, raw_theta, correct_wrapped_theta):
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"""Check that RX rotation angles are correctly wrapped to [0, pi]"""
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backend = GenericBackendV2(num_qubits=5)
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tp = NormalizeRXAngle(target=backend.target)
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# circuit to transpile and test
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qc = QuantumCircuit(1)
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qc.rx(raw_theta, 0)
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transpiled_circuit = tp(qc)
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wrapped_theta = transpiled_circuit.get_instructions("rx")[0].operation.params[0]
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self.assertAlmostEqual(wrapped_theta, correct_wrapped_theta)
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@named_data(
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{
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"name": "angles are within resolution",
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"resolution": 0.1,
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"rx_angles": [0.3, 0.303],
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"correct_num_of_cals": 1,
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},
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{
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"name": "angles are not within resolution",
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"resolution": 0.1,
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"rx_angles": [0.2, 0.4],
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"correct_num_of_cals": 2,
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},
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{
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"name": "same angle three times",
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"resolution": 0.1,
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"rx_angles": [0.2, 0.2, 0.2],
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"correct_num_of_cals": 1,
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},
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)
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def test_quantize_angles(self, resolution, rx_angles, correct_num_of_cals):
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"""Test that quantize_angles() adds a new calibration only if
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the requested angle is not in the vicinity of the already generated angles.
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"""
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backend = GenericBackendV2(num_qubits=5)
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tp = NormalizeRXAngle(backend.target, resolution_in_radian=resolution)
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qc = QuantumCircuit(1)
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for rx_angle in rx_angles:
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qc.rx(rx_angle, 0)
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transpiled_circuit = tp(qc)
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angles = [
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inst.operation.params[0]
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for inst in transpiled_circuit.data
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if inst.operation.name == "rx"
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]
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angles_without_duplicate = list(dict.fromkeys(angles))
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self.assertEqual(len(angles_without_duplicate), correct_num_of_cals)
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if __name__ == "__main__":
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unittest.main()
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