The Pegg-Barnett formalism and covariant phase observables

: Lahti P, Pellonpaa JP

Publisher: ROYAL SWEDISH ACAD SCIENCES

: 2002

Physica Scripta

PHYSICA SCRIPTA

: PHYS SCRIPTA

: 66

: 1

: 66

: 70

: 5

: 0031-8949

DOI: https://doi.org/10.1238/Physica.Regular.066a00066

We compare the Pegg-Barnett (PB) formalism with the covariant phase observable approach to the problem of quantum phase and show that PB-formalism gives essentially the same results as the canonical (covariant) phase observable. We also show that PB-formalism can be extended to cover all covariant phase observables including the covariant phase observable arising from the angle margin of the Husimi Q-function.