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)

Chapter 6: Understanding the Qiskit® Gate Library

In this chapter, we will explore the quantum gates that are offered out of the Qiskit® box. By including a quantum gate library that features the most common gates, Qiskit® makes coding your circuits easy.

Among the gates that we will look at are the Pauli X, Y, and Z gates used for basic qubit flips, the H (or Hadamard) gate used to create qubit superpositions, and the CX (controlled-NOT) gate used to create quantum entanglement. For a quick refresher, take a look at Chapter 4, Starting at the Ground Level with Terra.

We will also look at the specialized S and T gates, spin our qubits with R gates, and then show how just a minimal set of U1, U2, U3, ID, and CX basis gates are used to translate the other gates for direct use with a quantum computer.

We will stop by the multi-qubit gates and finally end our tour with a short look beneath the covers to see how the simple gates that we string out in the Qiskit...