Extension of quantum information theory to curved spacetimes
Abstract
Description
The representation of measurements by positive operator valued measures and the description of the most general state transformations by means of completely positive maps are two basic concepts of quantum information theory. These concepts can be trivially extended to field theories in curved spacetime if all the representations of canonical commutation or anticommutation relations are unitarily equivalent. We show that both concepts can be applied even when there is no such unitary equivalence.
4 pages, RevTeX, contribution to Proceedings of the conference "Quantum Theory: reconsideration of foundations", Vaxjo, July 2001
4 pages, RevTeX, contribution to Proceedings of the conference "Quantum Theory: reconsideration of foundations", Vaxjo, July 2001