3 problems

Let $\mathcal{X}$ be an input alphabet, let $\mathcal{B}$ be an output quantum system, and let $x\mapsto\rho_{\mathcal{B}}^x$ be a classical–quantum channel. For an input distribut…

Let a classical-quantum channel map each input symbol to an arbitrary, possibly mixed, quantum state, and consider random i.i.d. codes generated according to a fixed input distribu…

Let $\mathcal{M}$ be a classical-quantum channel, and let $E_L^{\emptyset}(0^+,\mathcal{M})$ denote its unassisted zero-rate list-decoding error exponent with list size $L$. Let…