Schwinger, Pegg and Barnett and a relationship between angular and Cartesian quantum descriptions
Abstract
From a development of an original idea due to Schwinger, it is shown that it is possible to recover, from the quantum description of a degree of freedom characterized by a finite number of states (iti.e., without classical counterpart) the usual canonical variables of position/momentum itand angle/angular momentum, relating, maybe surprisingly, the first as a limit of the later.
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