  The quasi-probabilistic Wigner distributions are the quantum mechanical
analog of the classical phase-space distributions. We investigate quark Wigner
distributions for a quark state dressed with a gluon, which can be thought of
as a simple composite and relativistic spin-1/2 state with a gluonic degree of
freedom. We calculate various polarization configurations, namely unpolarized,
longitudinally polarized and transversely polarized quark and the target state
using light-front wave functions in this model. At leading twist, one can
define 16 quark Wigner distributions, however, we obtain only 8 independent
non-zero Wigner distributions in our model. We compare our results with other
model calculations for the proton.
