100 citations · 239 across the 5 of their papers we have counts for
5 papers · 1 filter
Sufficient separability criteria and linear maps
Maciej Lewenstein, Remigiusz Augusiak, Dariusz Chruściński +2
We study families of positive and completely positive maps acting on a bipartite system (with ). The maps have a property that when appl…
Entangled symmetric states of N qubits with all positive partial transpositions
R. Augusiak, J. Tura, J. Samsonowicz +1
From both theoretical and experimental points of view symmetric states constitute an important class of multipartite states. Still, entanglement properties of these states, in part…
Four-qubit entangled symmetric states with positive partial transpositions
J. Tura, R. Augusiak, P. Hyllus +3
We solve the open question of the existence of four-qubit entangled symmetric states with positive partial transpositions (PPT states). We reach this goal with two different approa…
Separability, entanglement and full families of commuting normal matrices
Jan Samsonowicz, Marek Kus, Maciej Lewenstein
We reduce the question whether a given quantum mixed state is separable or entangled to the problem of existence of a certain full family of commuting normal matrices whose matrix…
Separability and distillability in composite quantum systems -a primer-
M. Lewenstein, D. Bruss, J. I. Cirac +5
Quantum mechanics is already 100 years old, but remains alive and full of challenging open problems. On one hand, the problems encountered at the frontiers of modern theoretical ph…