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Dancing with Qubits

Dancing with Qubits

By : Robert S. Sutor
5 (24)
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Dancing with Qubits

Dancing with Qubits

5 (24)
By: Robert S. Sutor

Overview of this book

Dancing with Qubits, Second Edition, is a comprehensive quantum computing textbook that starts with an overview of why quantum computing is so different from classical computing and describes several industry use cases where it can have a major impact. A full description of classical computing and the mathematical underpinnings of quantum computing follows, helping you better understand concepts such as superposition, entanglement, and interference. Next up are circuits and algorithms, both basic and sophisticated, as well as a survey of the physics and engineering ideas behind how quantum computing hardware is built. Finally, the book looks to the future and gives you guidance on understanding how further developments may affect you. This new edition is updated throughout with more than 100 new exercises and includes new chapters on NISQ algorithms and quantum machine learning. Understanding quantum computing requires a lot of math, and this book doesn't shy away from the necessary math concepts you'll need. Each topic is explained thoroughly and with helpful examples, leaving you with a solid foundation of knowledge in quantum computing that will help you pursue and leverage quantum-led technologies.
Table of Contents (26 chapters)
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1
I Foundations
8
II Quantum Computing
14
III Advanced Topics
18
Afterword
22
Other Books You May Enjoy
23
References
24
Index
Appendices

5.9 Change of basis

Given an n-dimensional vector space V, we can choose different bases for V. Let’s call two of them basis$change of

Displayed math

If v is a vector in V, it has one set of coordinates corresponding to X and another set for Y. How do we change from one set of coordinates for v to the other?

Let’s look at an example demonstrating how the choice of basis can make things easier.

Suppose we have city blocks laid out in a rectilinear pattern as in Figure 5.20. We use the basis vectors x1 = (1, 0) and x2 = (0, 2) to position ourselves. I’ve given the coordinates using the standard basis.

 Figure 5.20: City blocks laid out according to the standard basis grid

I can give you directions by saying, “Go north along x2 for 1 block, turn right, and go east along x1 for 2 blocks.” That puts you where the star is in the picture. In terms of the X basis, the position is 2x1 +...

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