213 citations · 652 across the 41 of their papers we have counts for
3 papers · 1 filter
Spectral conditions for entanglement witnesses vs. bound entanglement
Dariusz Chruscinski, Andrzej Kossakowski, Gniewomir Sarbicki
It is shown that entanglement witnesses constructed via the family of spectral conditions are decomposable, i.e. cannot be used to detect bound entanglement. It supports several ob…
Constructing new optimal entanglement witnesses
Dariusz Chruscinski, Justyna Pytel, Gniewomir Sarbicki
We provide a new class of indecomposable entanglement witnesses. In 4 x 4 case it reproduces the well know Breuer-Hall witness. We prove that these new witnesses are optimal and at…
General theory of detection and optimality
Gniewomir Sarbicki
A general formulation of the problem of detection for a pair of two cones is presented. The special case is the detection of entangled states by entanglement witnesses. Having defi…