278 citations · 1.6k across the 52 of their papers we have counts for
5 papers · 2 filters
Exposed positive maps: a sufficient condition
Dariusz Chruściński, Gniewomir Sarbicki
Exposed positive maps in matrix algebras define a dense subset of extremal maps. We provide a sufficient condition for a positive map to be exposed. This is an analog of a spanning…
On correlations and mutual entropy in quantum composed systems
Yuji Hirota, Dariusz Chruściński, Takashi Matsuoka +1
We study the correlations of classical and quantum systems from the information theoretical points of view. We analyze a simple measure of correlations based on entropy (such measu…
On exposed positive maps: Robertson and Breuer-Hall maps
Dariusz Chruściński
It is well known that so called Breuer-Hall positive maps used in entanglement theory are optimal. We show that these maps possess much more subtle property --- they are exposed. A…
On measures of non-Markovianity: divisibility vs. backflow of information
Dariusz Chruściński, Andrzej Kossakowski, Ángel Rivas
We analyze two recently proposed measures of non-Markovianity: one based on the concept of divisibility of the dynamical map and the other one based on distinguishability of quantu…
A family of generalized Horodecki-like entangled states
Dariusz Chruściński, Adam Rutkowski
We provide a multi-parameter family of 2-qudit PPT entangled states which generalizes the celebrated Horodecki state in 3 x 3. The entanglement of this family is identified via sem…