Physics – Quantum Physics
Scientific paper
2002-09-17
J. Math. Phys. 44 (2003) 466-479.
Physics
Quantum Physics
19 pages
Scientific paper
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 difference of two phase observables is given. Classical limit 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.
Heinonen T.
Lahti Pekka
Pellonpaa Juha-Pekka
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