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)

What your quantum circuit really looks like

In Chapter 3, IBM Quantum Experience® – Quantum Drag and Drop, and Chapter 5, Touring the IBM Quantum® Hardware with Qiskit®, we touched on the concept of transpiling, and the fact that a physical quantum computer cannot natively run all the various quantum gates that we throw at it. Instead, each backend comes with a set of basis gates, such as u1, u2, u3, id, and cx. We discussed these gates in the previous recipes of this chapter and even listed how the other gates can be written as implementations or combinations of these.

In this recipe, we will take a look at some other aspects of the transpiling of circuits, such as the following:

  • Simple transpiling of common gates to basis gates
  • Transpiling for a simulator
  • Transpiling your circuit if it doesn't match the physical layout of the backend

    One-qubit backend basis gates

    Most IBM Quantum® backends have the following basis gates: u1, u2, u3...