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)

Estimating the number of gates you have time for

In addition to the gate errors that we have explored in the first two recipes, the end result of your recipes depends on another physical aspect of the qubits that we run on: the T1 and T2 times. We first discussed these in the Explore your qubits to understand T1, T2, and errors recipe:

  • T1, or relaxation time: The T1 value is a statistical value of how long it takes for the qubit to spontaneously relax from the "excited" state to the ground state . In essence, T1 is the upper limit, in microseconds, that you have at your disposal to perform high-quality actions on the qubit.
  • T2, or dephasing time: Similar to T1, the T2 value is a statistical measure of how phase information is lost for a qubit. An example of phase change is when the state spontaneously changes to . Again, if the running time for your circuit starts to approach the T2 time, the quality of your readout data will suffer.

With this data,...