2001/11/27 by Daniel R. Terno, Terno, Daniel R.
Mathematics · Physics and Astronomy · #Advanced Operator Algebra Research #Black Holes and Theoretical Physics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Noncommutative and Quantum Gravity Theories #Quantum Physics (quant-ph) #gr-qc #hep-th #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0111144
4 pages, RevTeX, contribution to Proceedings of the conference "Quantum Theory: reconsideration of foundations", Vaxjo, July 2001
arxiv created 2001/11/27 · openalex publication_date 2001/11/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.