Unitary-equivalence conjecture for three-copy SIC estimation fidelity
Let A\mathscr{A}A and B\mathscr{B}B be SICs in dimension 333, and let F(A⊗3)F(\mathscr{A}^{\otimes 3})F(A⊗3) and F(B⊗3)F(\mathscr{B}^{\otimes 3})F(B⊗3) denote their three-copy estimation fidelities. S…