4 papers · 1 filter
Sufficient conditions for the Kadison--Schwarz property of unital positive maps on
Adam Rutkowski
Kadison--Schwarz (KS) maps form a natural class of positive linear maps lying strictly between positivity and complete positivity. Despite their relevance in operator algebras and…
Violation of steering inequality for generalized equiangular measurements
Adam Rutkowski, Katarzyna SiudziÅska
In this article, we study bipartite quantum steering using a general class of measurement operators known as the generalized equiangular measurement (GEAM). Our approach allows for…
Controlling nonlocality of bipartite qubit states via quantum channels
Adam Rutkowski, Katarzyna SiudziÅska
In this paper, we analyze quantum channels derived from a class of two-qubit states known as the X states. In particular, we consider X states that break the Bell's CHSH condition…
Constructive nonlocal games with very small classical values
M. Rosicka, S. Szarek, A. Rutkowski +2
There are few explicit examples of two player nonlocal games with a large gap between classical and quantum value. One of the reasons is that estimating the classical value is usua…