869 citations · 10.9k across the 170 of their papers we have counts for
172 papers
Multinegativity and single-letter formulas for asymptotic entanglement
Raphael Brinster, Tulja Varun Kondra, Hermann Kampermann +2
The study of entanglement inevitably leads to the concept of regularization, where measures are evaluated on infinitely many copies of a state. Single-letter formulas try to make t…
Sharp Quantum Capacity Thresholds: Exponential Strong Converses for Degradable and Antidegradable Channels
Tulja Varun Kondra, Raphael Brinster, Hermann Kampermann +2
The quantum capacity of a noisy channel quantifies the maximum rate at which quantum information can be transmitted reliably. For general channels, its evaluation requires an optim…
Very Strong Irreversibility of Quantum Entanglement
Tulja Varun Kondra, Raphael Brinster, Hermann Kampermann +2
The manipulation of quantum entanglement is fundamentally irreversible: some mixed entangled states require pure entanglement for their preparation, although no pure entanglement c…
Fundamental limitations on entanglement extraction from purity
Tulja Varun Kondra, Pedro Barrios Hita, Justus Neumann +2
States of sufficiently low purity are separable and cannot be entangled by unital (purity-non-generating) operations. Since high-purity states are experimentally demanding, it is n…
The relative entropy of magic and its nonadditivity
Carolin Deckers, Justus Neumann, Hermann Kampermann +1
In most stabilizer-based quantum computing schemes, so-called magic states are a necessary resource for implementing non-transversal quantum gates. With the resource theory of magi…
Bounds on quantum conference key agreement in pair-entangled networks
Justus Neumann, Hermann Kampermann, Dagmar Bruß +1
We investigate the task of conference key agreement in near-term quantum networks, where the nodes are connected by sources of bipartite entangled states, under the class of local…