6 papers · 1 filter
Robust Quantum Key Distribution Arbitrarily Close to Local Correlations
Hari Krishnan SV, Andreas Winter
Recently, Wooltorton et al. [Phys. Rev. Lett. 132, 210802 (2024)] and Farkas [Phys. Rev. Lett. 132, 210803 (2024)] have exhibited the mismatch between Bell inequality violations an…
The geometry of absolute separability and other convex matrix properties from spectrum
Jennifer Ahiable, Naga Bhavya Teja Kothakonda, Andreas Winter
We investigate the geometric structure of the set of spectra of bipartite absolute separable states () and absolute positive partial transpose states ($\mathrm…
Playing Bayesian games better with separable quantum states than with any classical correlation
Yaqing Xy Wang, Giannicola Scarpa, Andreas Winter
Bayesian games, also known as games of incomplete information, are a fruitful arena for exploring the impact of correlations on a set of independent agents (players) via the game e…
A Rate-Distortion Perspective on Quantum State Redistribution
Zahra Baghali Khanian, Andreas Winter
We consider a rate-distortion version of the quantum state redistribution task, where the error of the decoded state is judged via an additive distortion measure; it thus constitut…
New Protocols for Conference Key and Multipartite Entanglement Distillation
Farzin Salek, Andreas Winter
We approach two interconnected problems of quantum information processing in networks: Conference key agreement and entanglement distillation, both in the so-called source model wh…
Decoupling by local random unitaries without simultaneous smoothing, and applications to multi-user quantum information tasks
Pau Colomer, Andreas Winter
We show that a simple telescoping sum trick, together with the triangle inequality and a tensorisation property of expected-contractive coefficients of random channels, allow us to…