Michael Nielsen, co-author of the de-facto standard textbook for quantum computing [1], has an accessible "Quantum Computing for the Determined" video series on youtube [2].
(There used to be a pdf of the textbook online at [3], but it seems to have been removed...)
Scott Aaronson's Quantum Computing Since Democritus [4] is also good, but at a more abstract level. The well-written lecture notes it's based on are on his site [5].
General quantum physics knowledge can also help, but physics-focused content tends to focus more on the calculus whereas quantum computing mostly only uses the linear algebra. I liked The Theoretical Minimum [6].
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[ 2.9 ms ] story [ 12.3 ms ] thread(There used to be a pdf of the textbook online at [3], but it seems to have been removed...)
Scott Aaronson's Quantum Computing Since Democritus [4] is also good, but at a more abstract level. The well-written lecture notes it's based on are on his site [5].
General quantum physics knowledge can also help, but physics-focused content tends to focus more on the calculus whereas quantum computing mostly only uses the linear algebra. I liked The Theoretical Minimum [6].
1: http://www.amazon.com/Quantum-Computation-Information-Annive...
2: https://www.youtube.com/playlist?list=PL1826E60FD05B44E4
3: http://www.johnboccio.com/research/quantum/notes/QC10th.pdf
4: http://www.amazon.com/Quantum-Computing-since-Democritus-Aar...
5: http://www.scottaaronson.com/democritus/lec1.html
6: http://www.amazon.com/Quantum-Mechanics-The-Theoretical-Mini...