The parameter Γ is related to the radius of the generalized Bloch sphere r s through Γ = 2 N (r s -1), where s and s are complementary indices in the Stratonovich-Weyl transform. Among the vast parameter space, one of the best-performing choices 66,67 is when r s = r s = √ N + 1, which is referred to as s = W, leading to a ZPE parameter