ABSTRACT
We have already hinted at the relevance of information for measure-
ment. In the last chapter we have considered the relevance of non-
local correlations. It is time to deal again with measurement and
non-locality from the point of view of information. Indeed, in this
chapter, we shall learn how to treat quantum systems as information
processors along the lines of quantum reversibility presented in
Section 9.7. After providing a brief discussion on the nature of
information, we introduce the concepts of information accessibility
and partial information. We shall present a basic analysis of some
commonly used quantum gates in quantum computation. Quantum
teleportation and the quantum key distribution problem are then
analyzed. Finally, the important concept of mutual information and
its relation to quantum non-separability are discussed.
