What is the go to resource to learn about discrete Wigner's probability function? Are there different definitions? It is often said that magic states have negative Wigner function values, is this the case only for those states?
From a recent question, I was pointed to this article
- L Kocia, P. Love Discrete Wigner Formalism for Qubits and Non-Contextuality of Clifford Gates on Qubit Stabilizer States
could somebody exemplify how to carry a calculation for a given state? Let's say $$|\psi\rangle=\frac{|0\rangle+e^{i\pi/4}|1\rangle}{\sqrt2}$$
