32 citations · 57 across the 2 of their papers we have counts for
3 papers
quant-ph2010★ 25 cited
Optimal entanglement witnesses from generalized reduction and Robertson maps
Dariusz Chruściński, Justyna Pytel
We provide a generalization of the reduction and Robertson positive maps in matrix algebras. They give rise to a new class of optimal entanglement witnesses. Their structural physi…
quant-ph2010★ 32 cited
Constructing optimal entanglement witnesses. II
Dariusz Chruscinski, Justyna Pytel
We provide a class of optimal nondecomposable entanglement witnesses for 4N x 4N composite quantum systems or, equivalently, a new construction of nondecomposable positive maps in…
quant-ph2009
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…