A1 Refereed original research article in a scientific journal

Canonical phase measurement is pure



Authors: Heinosaari T, Pellonpaa JP

Publisher: AMER PHYSICAL SOC

Publication year: 2009

Journal: Physical Review A

Journal name in source: PHYSICAL REVIEW A

Journal acronym: PHYS REV A

Article number: ARTN 040101

Volume: 80

Issue: 4

Number of pages: 4

ISSN: 1050-2947

DOI: https://doi.org/10.1103/PhysRevA.80.040101


Abstract
We show that the canonical phase measurement is pure in the sense that the corresponding positive operator valued measure (POVM) is extremal in the convex set of all POVMs. This means that the canonical phase measurement cannot be interpreted as a noisy measurement even if it is not a projection valued measure.



Last updated on 2024-26-11 at 22:32