Book Image

Quantum Computing with Silq Programming

By : Srinjoy Ganguly, Thomas Cambier
Book Image

Quantum Computing with Silq Programming

By: Srinjoy Ganguly, Thomas Cambier

Overview of this book

Quantum computing is a growing field, with many research projects focusing on programming quantum computers in the most efficient way possible. One of the biggest challenges faced with existing languages is that they work on low-level circuit model details and are not able to represent quantum programs accurately. Developed by researchers at ETH Zurich after analyzing languages including Q# and Qiskit, Silq is a high-level programming language that can be viewed as the C++ of quantum computers! Quantum Computing with Silq Programming helps you explore Silq and its intuitive and simple syntax to enable you to describe complex tasks with less code. This book will help you get to grips with the constructs of the Silq and show you how to write quantum programs with it. You’ll learn how to use Silq to program quantum algorithms to solve existing and complex tasks. Using quantum algorithms, you’ll also gain practical experience in useful applications such as quantum error correction, cryptography, and quantum machine learning. Finally, you’ll discover how to optimize the programming of quantum computers with the simple Silq. By the end of this Silq book, you’ll have mastered the features of Silq and be able to build efficient quantum applications independently.
Table of Contents (19 chapters)
Section 1: Essential Background and Introduction to Quantum Computing
Section 2: Challenges in Quantum Programming and Silq Programming
Section 3: Quantum Algorithms Using Silq Programming
Section 4: Applications of Quantum Computing

Defining variables in Silq

Let's see how to assign data to a variable in the Silq language. Variable assignment is one of the fundamental techniques used in programming to store data in memory and then access it as and when required in a particular program.

The symbols that are used to do variable assignment are := (colon and equals symbol) and : (colon symbol), which are used to assign a particular data type to the variable. Let's see an example of this in the following code:


In the preceding code, you can see that H(x) is assigned to the x variable, which is a qubit, and H(x) is the Hadamard gate applied to the x qubit.

Now, if you want to make x a qubit, then you have to assign it the Boolean data type. This is shown in the next code block:


This means that you have defined x as the 0 qubit and have made it of the quantum Boolean type. To make x of the classical type, you have to use the ! Silq annotation to distinguish quantum and classical...