“…In both relativistic or non-relativistic representations, the solutions of equations in phase space, ψ(q, p) are related to Wigner function by the star-product, that is., f W (q, p) = ψ(q, p) ⋆ ψ † (q, p). This provides a fully physical interpretations for the representation, with an interesting perspective: This formalism provides a way to address gauge theories and perturbative methods in phase space context, which is not a simple task in the usual Wigner formalism [27][28][29]. The Wigner function is the main object calculated in this article, for this we use the formalism of the phase space, whose projections on the axis of the momenta or coordinates, reproduce the results of the usual quantum mechanics.…”