4 problems

Let $d_1$ and $d_2$ be the input and output dimensions of a quantum channel, let $r$ be its Choi rank, and let $\varepsilon$ be the tomography error. Near the boundary…

Let $\mathcal{E}$ be a quantum channel with input dimension $d_1$, output dimension $d_2$, and Choi rank $r$, and let $\varepsilon$ denote the tomography error. Mele–Bittel's optim…

Let the channel directions be the three principal directions associated with the Pauli channel, and let a measurement and input strategy be described by bases relative to those dir…

Let $\underline{\lambda}$ denote the channel contraction parameters and let $N$ be the number of channel uses. Let…