  In this work, we derive a discrete analog of the Wigner transform over the
space $(\mathbb{C}^p)^{\otimes N}$ for any prime $p$ and any positive integer
$N$. We show that the Wigner transform over this space can be constructed as
the inverse Fourier transform of the standard Pauli matrices for $p=2$ or more
generally of the Heisenberg-Weyl group elements for $p > 2$. We connect our
work to a previous construction by Wootters of a discrete Wigner transform by
showing that for all $p$, Wootters' construction corresponds to taking the
inverse symplectic Fourier transform instead of the inverse Fourier transform.
Finally, we discuss some implications of these results for the numerical
simulation of many-body quantum spin systems.
