John Watrous is a Professor in the School of Computer Science and a Faculty Member of the Institute for Quantum Computing at the University of Waterloo, Ontario. He is also an Affiliate Member of the Perimeter Institute for Theoretical Physics and a Senior Fellow of the Canadian Institute for Advanced Research. Quantum information and computation has been his primary research focus for over twenty years.
'This is a great book that fulfills a vital need: a unified, precise, and complete presentation of the most important topics in quantum information … Reading the book in detail (verifying the proofs all the while) gave me a solid, confident understanding of the techniques used by those in the field - an understanding that I am eager to apply in the future.' Stephen A. Fenner, SIGACT News