Covariant phase difference observables in quantum mechanics
: Heinonen T, Lahti P, Pellonpaa JP
Publisher: AMER INST PHYSICS
: 2003
Journal of Mathematical Physics
JOURNAL OF MATHEMATICAL PHYSICS
: J MATH PHYS
: 44
: 2
: 466
: 479
: 14
: 0022-2488
DOI: https://doi.org/10.1063/1.1534383
Covariant phase difference observables are determined in two different ways, by a direct computation and by a group theoretical method. A characterization of phase difference observables which can be expressed as the difference of two phase observables is given. The classical limits of such phase difference observables are determined and the Pegg-Barnett phase difference distribution is obtained from the phase difference representation. The relation of Ban's theory to the covariant phase theories is exhibited. (C) 2003 American Institute of Physics.