Reduction and Extremality of Finite Observables

Autor(en): Schmidt, Heinz-Juergen
Stichwörter: Direct sum of observables; Extreme observables; Finite POV measures; Physics; Physics, Multidisciplinary
Erscheinungsdatum: 2019
Herausgeber: SPRINGER
Journal: FOUNDATIONS OF PHYSICS
Volumen: 49
Ausgabe: 6, SI
Startseite: 577
Seitenende: 593
Zusammenfassung: 
We investigate the theory of finite observables, i.e., resolutions of the finite-dimensional identity by means of positive operators, that have a physical interpretation in terms of measurement schemes. We focus on extremal and rank-one observables and consider various constructions that reduce observables to simpler ones. However, these constructions do not suffice to generate all finite extremal observables, as we show by means of counter-examples.
ISSN: 00159018
DOI: 10.1007/s10701-019-00259-x

Show full item record

Google ScholarTM

Check

Altmetric