137 citations · 441 across the 22 of their papers we have counts for
4 papers · 1 filter
Parameterizing density matrices for composite quantum systems
Erwin Bruening, Dariusz Chruscinski, Francesco Petruccione
A parametrization of density operators for bipartite quantum systems is proposed. It is based on the particular parametrization of the unitary group found recently by Jarlskog. It…
Remarks on the GNS Representation and the Geometry of Quantum States
Dariusz Chruscinski, Giuseppe Marmo
It is shown how to introduce a geometric description of the algebraic approach to the non-relativistic quantum mechanics. It turns out that the GNS representation provides not only…
Spectral conditions for positive maps
Dariusz Chruscinski, Andrzej Kossakowski
We provide a partial classification of positive linear maps in matrix algebras which is based on a family of spectral conditions. This construction generalizes celebrated Choi exam…
Generalized Circulant Densities and a Sufficient Condition for Separability
Dariusz Chruscinski, Arthur O. Pittenger
In a series of papers with Kossakowski, the first author has examined properties of densities for which the positive partial transpositrionm (PPT) property can be readily checked.…