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

Exploring multi-qubit quantum logic gates in Silq

In Chapter 3, Multiple Quantum Bits, Entanglement, and Quantum Circuits, you looked at the most important multi-qubit quantum logic gates, which are used frequently to construct quantum circuits. As discussed in that chapter, having multiple qubits gives us an advantage in that we can encode more information in an efficient way. So, we will now dive into multi-qubit quantum logic gates in Silq. Let's start our discussion with the CNOT gate.

The quantum CX or CNOT gate

In Silq, the CX gate is usually created using an if condition because when the condition becomes true, only then is the target qubit flipped.

Let's see the Silq implementation of the CX gate:

def main() {
  return CX(1:,0:);
def CX(const x:,y:):{
  if x{
    y := X(y);
  return y;

In the preceding code, you can see the function of the CX gate, where the x qubit (the first qubit...