Quantum Computing

Way back in 1992, Springer-Verlag published my first book Axiom: The Scientific Computation System, co-authored with the late Richard D. Jenks. Since then I’ve thought of writing other books, but work and life in general caused enough inertia that I never got around to it.

I first got involved with IBM’s quantum computing effort in early 2016. By 2018, I was again thinking of writing a book and this subject was an obvious candidate. How would I start? What would I say? What was my perspective on the topic given that there were already some excellent books?

To write a book, you have to start writing. This is obvious, but no less true and important. In the summer of 2018, I started writing what I thought would be the introduction to the book. My perspective was, and is, very much from the mathematical and computer science directions. To be clear, I am not a physicist. If I could produce a coherent introduction to what I thought the book would cover, I might convince myself that it would be worth the hundreds of hours it would take to complete the project.

When I recently announced that the book was available for pre-order, my industry colleague Jason Bloomberg asked:

“So where does it fall on the spectrum between ‘totally accurate yet completely impenetrable’ and ‘approachable by normal humans but a complete whitewash’?”

I responded:

“I bring you along … to give you the underlying science of quantum computing so you can then read the “totally accurate but formally impenetrable” texts.”

I decided that I would cover the basic math necessary to understand quantum computing, and then get into quantum bits (qubits), gates, circuits, and algorithms. Although readers with the necessary background (or perhaps a good memory of that background) can skip the mathematical fundamentals, I decided to take people through the algebra and geometry of complex numbers, linear algebra, and probability necessary to understand what qubits are and what you can do with them.

That early draft of the book’s introduction described roughly 15 chapters divided into three parts. The final book has 12 chapters and 2 parts. That introduction eventually became the Preface. Part III eventually became Chapter 1.

It’s much tighter than what I imagined it would be, but there is still material I could have covered. There’s a natural tendency to want to add more and more, but I kept asking myself “What is this book about? How deeply do I want to go? Am I getting off track? Will I ever finish?”.

As 2018 went on, I kept tweaking the introduction and I started talking to publishers. In November, I started writing what was then the first chapter. Although I started in Microsoft Word, which is overwhelmingly the format of choice for many publishers, I quickly switched to LaTeX. This produced a far more beautiful book, but also placed constraints on how I could publish the book.

With this as teaser, in future entries I’ll talk more about the writing process, choices I made, LaTeX packages I used and macros I wrote, deciding how to publish the book, and working with editors. Once the book is available, I’ll talk about the specific content and why I included what I did.

Next: Last minute tweaks to my quantum computing book cover