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.
|Title of host publication||Proceedings of Quantum theory|
|Subtitle of host publication||reconsideration of foundations|
|Place of Publication||Sweden|
|Publisher||Vaxjo University Press|
|Number of pages||6|
|Publication status||Published - 2002|
|Event||Quantum theory: reconsideration of foundations - Vaxjo, Sweden|
Duration: 17 Jun 2001 → 21 Jun 2001
|Conference||Quantum theory: reconsideration of foundations|
|Period||17/06/01 → 21/06/01|
Terno, D. R. (2002). Extension of quantum information theory to curved spacetimes. In A. Khrennikov (Ed.), Proceedings of Quantum theory: reconsideration of foundations (pp. 397-403). Sweden: Vaxjo University Press.