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5 papers
Families of -positive maps and Schmidt number witnesses from generalized equiangular measurements
Katarzyna SiudziÅska
Quantum entanglement is an important resource in many modern technologies, like quantum computation or quantum communication and information processing. Therefore, most interest is…
Entanglement witnesses and separability criteria based on generalized equiangular tight frames
Katarzyna SiudziÅska
We use operators from generalized equiangular measurements to construct positive maps. Their positivity follows from the inequality for indices of coincidence corresponding to few…
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…
Decomposable dynamics on matrix algebras
Katarzyna SiudziÅska, Krzysztof Szczygielski
We explore a notion of decomposably divisible (D-divisible) quantum evolution families, recently introduced in J. Phys. A: Math. Theor. 56, 485202 (2023). Both necessary and suffic…