Difference between revisions 24016422 and 24046168 on enwiki

'''[[Quantum mechanics]] and [[Theory of relativity|relativity]] theory''' comprisare two of the foundational stones of [[theoretical physics]], andwhile [[information theory]] is one of the most successfulwidely applied of all theories in [[applied mathematics]].

In quantum mechanics, one is obsessconcerned with what one can hope to learn about a physical system (for example, according to the [[uncertainty principle]], one cannot hope to learn both the position and momentum of an electron to arbitrary accuracy).

In relativity theory, one learnof the basic principles is that signals cannot be propagated faster than light, and that all observers measure the same value for this maximal speed (in a vacuum).  Put another way, given a particular [[event]] A in a given [[spacetime]] model (such as an [[exact solutions in general relativity|exact solution in general relativity]], there is a definite region, called the [[absolute future]] of A, such that no events outside the absolute future can be causally affected by event A.

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* Christopher Fuchs, ''Quantum mechanics as quantum information (and only a little more)'' in A. Khrenikov (ed.) Quantum Theory: Reconstruction of Foundations (Växjo: Växjo University Press, 2002).
*Asher Peres and Daniel Terno. ''Quantum Information and Relativity Theory'' Rev.Mod.Phys. 76 (2004) 93.

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