Book Image

A Practical Guide to Quantum Machine Learning and Quantum Optimization

By : Elías F. Combarro, Samuel González-Castillo
4.5 (2)
Book Image

A Practical Guide to Quantum Machine Learning and Quantum Optimization

4.5 (2)
By: Elías F. Combarro, Samuel González-Castillo

Overview of this book

This book provides deep coverage of modern quantum algorithms that can be used to solve real-world problems. You’ll be introduced to quantum computing using a hands-on approach with minimal prerequisites. You’ll discover many algorithms, tools, and methods to model optimization problems with the QUBO and Ising formalisms, and you will find out how to solve optimization problems with quantum annealing, QAOA, Grover Adaptive Search (GAS), and VQE. This book also shows you how to train quantum machine learning models, such as quantum support vector machines, quantum neural networks, and quantum generative adversarial networks. The book takes a straightforward path to help you learn about quantum algorithms, illustrating them with code that’s ready to be run on quantum simulators and actual quantum computers. You’ll also learn how to utilize programming frameworks such as IBM’s Qiskit, Xanadu’s PennyLane, and D-Wave’s Leap. Through reading this book, you will not only build a solid foundation of the fundamentals of quantum computing, but you will also become familiar with a wide variety of modern quantum algorithms. Moreover, this book will give you the programming skills that will enable you to start applying quantum methods to solve practical problems right away.
Table of Contents (27 chapters)
1
Part I: I, for One, Welcome our New Quantum Overlords
4
Part II: When Time is Gold: Tools for Quantum Optimization
10
Part III: A Match Made in Heaven: Quantum Machine Learning
16
Part IV: Afterword and Appendices
17
Chapter 13: Afterword: The Future of Quantum Computing
19
Bibliography
20
Index
Appendix A: Complex Numbers
Appendix E: Production Notes

5.2 Using QAOA with Qiskit

With everything that we have learned in the previous sections of this chapter and what we already know about Qiskit from Chapter 2, The Tools of the Trade in Quantum Computing, and Section 3.2.2, we could implement our own Qiskit version of QAOA. However, there is no need for that! As we shall show in this section, the Qiskit Optimization package provides all that is necessary to run QAOA on both quantum simulators and actual quantum computers. Moreover, it includes a set of tools to work directly with problems written under the QUBO formalism. As a matter of fact, in this section, we will also see how, underneath the hood, Qiskit uses the very same mathematical concepts that we have been studying.

Let’s start by explaining how to work with QAOA in Qiskit when we already have the problem Hamiltonian.

5.2.1 Using QAOA with Hamiltonians

If we have the Hamiltonian that encodes our optimization problem, it is very easy to use Qiskit’s QAOA implementation...