30 citations · 78 across the 16 of their papers we have counts for
4 papers · 1 filter
Random and free observables saturate the Tsirelson bound for CHSH inequality
Z. Yin, A. W. Harrow, M. Horodecki +2
Maximal violation of the CHSH-Bell inequality is usually said to be a feature of anticommuting observables. In this work we show that even random observables exhibit near-maximal v…
A class of bistochastic positive optimal maps in
Adam Rutkowski, Gniewomir Sarbicki, Dariusz Chruściński
We provide a straightforward generalization of a positive map in considered recently by Miller and Olkiewicz \cite{Miller}. It is proved that these maps are optim…
Separability Properties for a Class of Block Matrices
Marek Mozrzymas, Adam Rutkowski, Michał Studziński
It is shown that, for the block matrices belonging to with commuting and normal block entries of dimension , the separability of such a block matrices is equi…
Using non-positive maps to characterize entanglement witnesses
Marek Mozrzymas, Adam Rutkowski, Michał Studziński
In this paper we present a new method for entanglement witnesses construction. We show that to construct such an object we can deal with maps which are not positive on the whole do…