Peculiarities of the Weyl - Wigner - Moyal formalism for scalar charged particles

Details Peculiarities of the Weyl - Wigner - Moyal formalism for scalar charged particles Peculiarities of the Weyl - Wigner - Moyal formalism for scalar charged particles

2001-02-19

arxiv.org/abs/quant-ph/0102095v2

J. Phys. A : Math. Gen. 34 (2001) 4323-4339

Physics

Quantum Physics

16 pages, 2 figures

Scientific paper

10.1088/0305-4470/34/20/306

A description of scalar charged particles, based on the Feshbach-Villars formalism, is proposed. Particles are described by an object that is a Wigner function in usual coordinates and momenta and a density matrix in the charge variable. It is possible to introduce the usual Wigner function for a large class of dynamical variables. Such an approach explicitly contains a measuring device frame. From our point of view it corresponds to the Copenhagen interpretation of quantum mechanics. It is shown how physical properties of such particles depend on the definition of the coordinate operator. The evolution equation for the Wigner function of a single-charge state in the classical limit coincides with the Liouville equation. Localization peculiarities manifest themselves in specific constraints on possible initial conditions.

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