Alexander Müller-Hermes

collaborators

3 papers

quant-ph2025

Monogamy of entanglement between cones

Guillaume Aubrun, Alexander MÃ¼ller-Hermes, Martin PlÃ¡vala

A separable quantum state shared between parties $A$ and $B$ can be symmetrically extended to a quantum state shared between party $A$ and parties $B_{1}, \dots, B_{k}$ for every $k\in…

quant-ph2024

Fault-tolerant Coding for Quantum Communication

Matthias Christandl, Alexander MÃ¼ller-Hermes

Designing encoding and decoding circuits to reliably send messages over many uses of a noisy channel is a central problem in communication theory. When studying the optimal transmi…

math.OA2024

Completely Bounded Norms of $k$ -positive Maps

Guillaume Aubrun, Kenneth R. Davidson, Alexander MÃ¼ller-Hermes +2

Given an operator system $S$ , we define the parameters $r_{k} (S)$ (resp. $d_{k} (S)$ ) defined as the maximal value of the completely bounded norm of a unit…

Monogamy of entanglement between cones

Fault-tolerant Coding for Quantum Communication

Completely Bounded Norms of k-positive Maps

Completely Bounded Norms of $k$ -positive Maps