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Canonical phase measurement is pure
Tekijät: Heinosaari T, Pellonpaa JP
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2009
Journal: Physical Review A
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A
Lehden akronyymi: PHYS REV A
Artikkelin numero: ARTN 040101
Vuosikerta: 80
Numero: 4
Sivujen määrä: 4
ISSN: 1050-2947
DOI: https://doi.org/10.1103/PhysRevA.80.040101
Tiivistelmä
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.
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.
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