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)

Tossing two coins simultaneously

So far, we have only played with one coin at a time, but there is nothing stopping us from adding more coins. In this recipe, we will add a coin to the simulation, and toss two coins simultaneously. We will do this by adding a second qubit, expanding the number of qubits – two of everything.

Getting ready

The sample code for this recipe can be found here:

How to do it...

Set up your code like the previous example, but with a 2-qubit quantum circuit:

  1. Import the classes and methods that we need:
    from qiskit import QuantumCircuit, Aer, execute
    from import plot_histogram
    from IPython.core.display import display
  2. Set up our quantum circuit with two qubits and two classical bits:
    qc = QuantumCircuit(2, 2)
  3. Add the Hadamard gates and the measurement gates...