Book Image

Quantum Computing in Practice with Qiskit® and IBM Quantum Experience®

By : Hassi Norlen
5 (1)
Book Image

Quantum Computing in Practice with Qiskit® and IBM Quantum Experience®

5 (1)
By: Hassi Norlen

Overview of this book

IBM Quantum Experience® is a leading platform for programming quantum computers and implementing quantum solutions directly on the cloud. This book will help you get up to speed with programming quantum computers and provide solutions to the most common problems and challenges. You’ll start with a high-level overview of IBM Quantum Experience® and Qiskit®, where you will perform the installation while writing some basic quantum programs. This introduction puts less emphasis on the theoretical framework and more emphasis on recent developments such as Shor’s algorithm and Grover’s algorithm. Next, you’ll delve into Qiskit®, a quantum information science toolkit, and its constituent packages such as Terra, Aer, Ignis, and Aqua. You’ll cover these packages in detail, exploring their benefits and use cases. Later, you’ll discover various quantum gates that Qiskit® offers and even deconstruct a quantum program with their help, before going on to compare Noisy Intermediate-Scale Quantum (NISQ) and Universal Fault-Tolerant quantum computing using simulators and actual hardware. Finally, you’ll explore quantum algorithms and understand how they differ from classical algorithms, along with learning how to use pre-packaged algorithms in Qiskit® Aqua. By the end of this quantum computing book, you’ll be able to build and execute your own quantum programs using IBM Quantum Experience® and Qiskit® with Python.
Table of Contents (12 chapters)

Quantum coin toss revisited

In this recipe, we will take a closer look at the very first quantum program we created in IBM Quantum Experience® – the quantum coin toss. Again, this is arguably the simplest quantum program that still provides real quantum computing value. It demonstrates the probabilistic nature of quantum computing. For a refresher, see Chapter 3, IBM Quantum Experience® – Quantum Drag and Drop.

In IBM Quantum Experience®, the coin toss program looked like this:

Figure 4.1 – Simple coin toss circuit in the IBM Quantum Experience® composer

With the quantum coin toss, we will again use the Hadamard gate to create a quantum superposition, and a measurement gate to force the superposition to collapse into one of the two qubit states or , representing heads or tails. This time, however, we will create the circuit in Python with Qiskit®, which means that we need to also create the framework for the...