3 citations · 3 across the 1 of their papers we have counts for
2 papers
quant-ph2013★ 3 cited
Extremal entanglement witnesses
Leif Ove Hansen, Andreas Hauge, Jan Myrheim +1
We study extremal entanglement witnesses on a bipartite quantum system. We define the cone of witnesses as the dual of the set of separable density matrices, thus $\textrm{Tr}\,Ωρ\…
quant-ph2011
Low rank positive partial transpose states and their relation to product vectors
Leif Ove Hansen, Andreas Hauge, Jan Myrheim +1
It is known that entangled mixed states that are positive under partial transposition (PPT states) must have rank at least four. In a previous paper we presented a classification o…