Aldrovandi, Ruben [UNESP]Galetti, Diogenes [UNESP]2014-05-272014-05-271990-12-01Journal of Mathematical Physics, v. 31, n. 12, p. 2987-2995, 1990.0022-2488http://hdl.handle.net/11449/64036The space of labels characterizing the elements of Schwinger's basis for unitary quantum operators is endowed with a structure of symplectic type. This structure is embodied in a certain algebraic cocycle, whose main features are inherited by the symplectic form of classical phase space. In consequence, the label space may be taken as the quantum phase space: It plays, in the quantum case, the same role played by phase space in classical mechanics, some differences coming inevitably from its nonlinear character. © 1990 American Institute of Physics.2987-2995engArtigo10.1063/1.528952Acesso aberto2-s2.0-00116234162-s2.0-0011623416.pdf