2 problems

Let a cyclic $t$-design in dimension $d$ be a finite orbit of a unitary acting on quantum states whose decohered probability vectors form a simplex $t$-design. Cyclic 2-design exis…

Let $\Delta_d$ denote the $d$-point probability simplex, and let a simplex $t$-design be a collection of points in $\Delta_d$ whose moments agree with those of the uniform simplex…