Book Image

Quantum Computing Experimentation with Amazon Braket

By : Alex Khan
5 (1)
Book Image

Quantum Computing Experimentation with Amazon Braket

5 (1)
By: Alex Khan

Overview of this book

Amazon Braket is a cloud-based pay-per-use platform for executing quantum algorithms on cutting-edge quantum computers and simulators. It is ideal for developing robust apps with the latest quantum devices. With this book, you'll take a hands-on approach to learning how to take real-world problems and run them on quantum devices. You'll begin with an introduction to the Amazon Braket platform and learn about the devices currently available on the platform, their benefits, and their purpose. Then, you'll review key quantum concepts and algorithms critical to converting real-world problems into a quantum circuit or binary quadratic model based on the appropriate device and its capability. The book also covers various optimization use cases, along with an explanation of the code. Finally, you'll work with a framework using code examples that will help to solve your use cases with quantum and quantum-inspired technologies. Later chapters cover custom-built functions and include almost 200 figures and diagrams to visualize key concepts. You’ll be able to scan the capabilities provided by Amazon Braket and explore the functions to adapt them for specific use cases. By the end of this book, you’ll have the tools to integrate your current business apps and AWS data with Amazon Braket to solve constrained and multi-objective optimization problems.
Table of Contents (19 chapters)
1
Introduction
Free Chapter
2
Section 1: Getting Started with Amazon Braket
7
Section 2: Building Blocks for Real-World Use Cases
13
Section 3: Real-World Use Cases

Understanding device costs and billing

We will now look at the very important topic of device costs. We will look at the published device costs and then also explore how to estimate the cost of a QPU or simulator device based on the number of shots the device is used for. The number of shots is the number of times the circuit will be recreated, run, and the end results measured by the device. Since quantum systems have probabilistic results, this process requires multiple shots to get the probability distribution of all the possible results.

QPU versus simulator devices

QPU devices are charged a fee per task and then there is a per shot charge. The number of qubits you measure at the end of your circuit will, to some extent, determine the number of shots.

Figure 3.14 – Cost of QPU devices available in Amazon Braket (these prices are correct as of May 2022; check the current prices at https://aws.amazon.com/braket/pricing/)

In order to limit the...