I want to learn about Quantum Computing

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Discussion Overview

The discussion centers around finding appropriate literature for learning about Quantum Computing (QC), particularly for individuals who already have a background in Quantum Mechanics. Participants seek recommendations for mid-level resources and explore the relationship between historical concepts of quantum computing and contemporary understanding.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants express a desire for mid-level literature on QC that bridges the gap between introductory texts and advanced materials, specifically for those familiar with Quantum Mechanics.
  • One participant suggests that understanding how a QC device works does not necessarily aid in understanding its applications, drawing a parallel to digital computing.
  • Another participant notes that Feynman's original ideas about quantum computers focused on simulating quantum systems, while modern QC often addresses problems unrelated to quantum systems, such as number theory and combinatorics.
  • Several participants recommend specific books, including "Programming Quantum Computers" by O'Reilly, and "Quantum Computing for Computer Scientists," highlighting their accessibility and relevance.
  • One participant mentions the rapidly evolving nature of the field and the variety of approaches to existing challenges, suggesting that readers should be aware of this context.
  • Another participant identifies "Nielsen and Chang" as a key textbook and mentions "Quantum Approach to Informatics" as another valuable resource.

Areas of Agreement / Disagreement

Participants generally agree on the need for mid-level resources and express varying opinions on the relevance of historical concepts to current QC practices. There is no consensus on a single recommended text, as multiple suggestions are offered, reflecting differing perspectives on what constitutes an appropriate resource.

Contextual Notes

Participants acknowledge the limitations of existing literature and the evolving nature of the field, which may affect the relevance and applicability of certain texts.

Thomas Rigby
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I want to learn about Quantum Computing (QC). I am familiar with Quantum Mechanics. So far I have found two types of literature: (1.) Introductions to QC for the layman, and (2) Literature for people who are already knowledgeable about the field. Can someone recommend a mid-level source along the lines of "Quantum Computing for People that know Quantum Mechanics"?

Secondary question - I have read this old Feynman lecture where he introduces the idea of a Quantum Computer. Is there a relationship between those ideas and what is nowadays referred to as Quantum Computing? Or have the ideas somehow diverged?
 
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Thomas Rigby said:
I want to learn about Quantum Computing (QC). I am familiar with Quantum Mechanics. So far I have found two types of literature: (1.) Introductions to QC for the layman, and (2) Literature for people who are already knowledgeable about the field. Can someone recommend a mid-level source along the lines of "Quantum Computing for People that know Quantum Mechanics"?
I have never seen such a thing, in the same way as I have never seen a book on "Digital computing for people that know electronics". Understanding how a QC device works is very little help in understanding how to use it.

Thomas Rigby said:
Secondary question - I have read this old Feynman lecture where he introduces the idea of a Quantum Computer. Is there a relationship between those ideas and what is nowadays referred to as Quantum Computing?
Not really. Feynman posited that in order to simulate a quantum system you needed to use a quantum computer. In QC we mainly try to solve problems that have nothing to do with quantum systems, such as problems in number theory and combinatorics. Also we have learned that it is possible to simulate a QC device in software running on a classical computer, contrary to Feynman's supposition.

These Cambridge University course notes are a useful overview; if you want you can skim over Lectures 3 and 4 as fast as you are able to.
 
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https://www.amazon.com/Programming-Quantum-Computers-Essential-Algorithms

That is an O'Reilly Book, which is usually the middle ground you seek. But the book is about using quantum computers, not how quantum computers work.
 
I wouldn't reject a book just because it addresses the QM subjects. If you really know that part, you can quickly skim through it and you should be well prepared for the other parts of the book.
You should be aware that the field is rapidly evolving and there are a variety of approaches to the large number of challenges remaining.
 

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