Physics – Quantum Physics
Scientific paper
2009-09-23
Phys. Rev. A 80, 040101(R) (2009)
Physics
Quantum Physics
4 pages
Scientific paper
10.1103/PhysRevA.80.040101
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.
Heinosaari Teiko
Pellonpaa Juha-Pekka
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