Figure 1. Circuit description. Source: IBM, Qiskit, and OpflowQNN.

Copyright notice: our code is an alteration of Qiskit Machine Learning which is a Copyright of IBM 2017, 2021. Qiskit is licensed under the Apache License, Version 2.0. All modifications of the code and derivative works are the responsibility of the authors.

q 0 = qubit initialization; Z, X = Pauli Z and X gates; H = Hadamard gate; Ry = single-qubit rotation gate through angle θ (radians) around the y-axis; Rx = single-qubit rotation gate through angle θ (radians) around the x-axis