Optimal covariant measurements: the case of a compact symmetry group and phase observables



: Carmeli C, Heinosaari T, Pellonpaa JP, Toigo A

Publisher: IOP PUBLISHING LTD

: 2009

Journal of Physics A: Mathematical and Theoretical

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL

: J PHYS A-MATH THEOR

: ARTN 145304

: 42

: 14

: 18

: 1751-8113

DOI: https://doi.org/10.1088/1751-8113/42/14/145304


We study various optimality criteria for quantum observables. Observables are represented as covariant positive operator valued measures and we consider the case when the symmetry group is compact. Phase observables are examined as an example.



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