QUBIT - A qubit is two numbers. 80 pages, drawn by hand, no maths.
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Most explanations of quantum computing lose you at the second sentence. This one doesn't.
QUBIT is 80 pages, every idea drawn by hand. No linear algebra. No Dirac notation. No maths you cannot do on your fingers.
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Hey Product Hunt, I'm Adarsh, and I made QUBIT.
Why I made it
Every explanation of quantum computing I found lost me at the second sentence. They all say "a qubit can be 0 and 1 at the same time" and then jump straight to vectors and Dirac notation, as if that sentence had explained
something. It hasn't. It's a slogan, and it makes the whole subject sound like magic.
So I wrote the book I wanted to read, and I drew every page by hand.
What's in it
80 pages, 5.5 x 8.5 in, in five parts: what a qubit is, what a gate is, what two qubits do together, how you run a circuit, and what these machines are genuinely good at. It opens with a light switch and a spinning coin and it ends with the Bell state. No linear algebra. No Dirac notation. No maths you can't do on your fingers. You get a print-ready PDF.
The honest bit
There's no code in it and no complex numbers. This is the book you read *before* the textbook, not instead of it. If you already know what a Bloch sphere is, this will be too slow for you.
It's $7.99 on Gumroad.
One thing I'd genuinely like to know: when you last tried to learn something technical from a book and put it down - where did it lose you? I'm collecting those, because they are exactly the failure modes I tried to design out of this one.