While quantum theory has been used to study the physical universe with great profit, both intellectual and financial, ever since its discovery eighty-five years ago, over the last fifty years we have found out more and more about the theory itself, and what it tells us about the universe. It seems we may have to accept n-locality - cause and effect may be light-years apart; loss of realism - nature may be fundamentally probabilistic; and n-determinism - it seems that God does play dice! This book, totally up-to-date and written by an expert in the field, explains the emergence of our new perspective on quantum theory, but also describes how the ideas involved in this re-evaluation led seamlessly to a totally new discipline - quantum information theory. This discipline includes quantum computation, which is able to perform tasks quite out of the range of other computers; the totally secure algorithms of quantum cryptography; and quantum teleportation - as part of science fact rather than science fiction. The book is the first to combine these elements, and will be of interest to anybody interested in fundamental aspects of science and their application to the real world.
Andrew Whitaker lectured at the University of Ulster from 1978-1988 before joining Queen's University Belfast where he is now Professor of Physics. For 25 years his main field of research has been on the Foundations of Quantum Theory, which has developed into the present 'hot topic' of Quantum Information Theory. Whitaker has published around 50 papers on this subject and has numerous publications on the History of Physics and Physics Education.