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)

Running diagnostics with the state vector simulator

In this recipe, we will explore the state vector simulator and see how you can use it to run diagnostics on your circuits to see how your qubits are behaving. The state vector simulator is not a quantum computer simulator per se, but a tool that runs through your quantum circuit with one shot and returns the qubit state vector that results. As these are simulators, you can actually use them to do diagnostic tests of your circuits without disturbing them and breaking the quantum state.

You will notice that we have used the state vector simulator before, when displaying the qubits as Bloch spheres, but we did not go into any great detail at that point. Using Bloch sphere visualization works well with single or multiple qubit visualization when each qubit has a definite simple state that can be projected on a Bloch sphere.

There is a different output—actually, several—that we will touch on. Each of these lets you...