Book Image

Learn Quantum Computing with Python and IBM Quantum Experience

By : Robert Loredo
Book Image

Learn Quantum Computing with Python and IBM Quantum Experience

By: Robert Loredo

Overview of this book

IBM Quantum Experience is a platform that enables developers to learn the basics of quantum computing by allowing them to run experiments on a quantum computing simulator and a real quantum computer. This book will explain the basic principles of quantum mechanics, the principles involved in quantum computing, and the implementation of quantum algorithms and experiments on IBM's quantum processors. You will start working with simple programs that illustrate quantum computing principles and slowly work your way up to more complex programs and algorithms that leverage quantum computing. As you build on your knowledge, you’ll understand the functionality of IBM Quantum Experience and the various resources it offers. Furthermore, you’ll not only learn the differences between the various quantum computers but also the various simulators available. Later, you’ll explore the basics of quantum computing, quantum volume, and a few basic algorithms, all while optimally using the resources available on IBM Quantum Experience. By the end of this book, you'll learn how to build quantum programs on your own and have gained practical quantum computing skills that you can apply to your business.
Table of Contents (21 chapters)
Section 1: Tour of the IBM Quantum Experience (QX)
Section 2: Basics of Quantum Computing
Section 3: Algorithms, Noise, and Other Strange Things in Quantum World
Appendix A: Resources

Learning about Grover's search algorithm

Search algorithms are unique in that they can be leveraged by various algorithms to find information, whether in a data repository or a list of values such as features in an image. The advantage to quantum, of course, is in the potential for the speed-up of the search. Grover's algorithm is one such example. It uses a well-known technique that allows the use of interference to amplify certain states in our quantum circuit in a way that will increase the amplitude of the value we are searching for and decrease those that we are not. Let's start, as always, by describing the problem, where each state is analogous to an entry in an unordered list.

Learning about the problem

The problem here is also very simple: we are given a set of states where all except one has a value set to 1 and all others are set to 0. We wish to identify which one of those states is set to 1.

Classically, this can be done in, in the best case,...