60 citations · 364 across the 22 of their papers we have counts for
20 papers · 1 filter
There exist infinitely many kinds of partial separability/entanglement
Kil-Chan Ha, Kyung Hoon Han, Seung-Hyeok Kye
In tri-partite systems, there are three basic biseparability, -, - and - biseparability according to bipartitions of local systems. We begin with three convex…
Separability of multi-qubit states in terms of diagonal and anti-diagonal entries
Kil-Chan Ha, Kyung Hoon Han, Seung-Hyeok Kye
We give separability criteria for general multi-qubit states in terms of diagonal and anti-diagonal entries. We define two numbers which are obtained from diagonal and anti-diagona…
Construction of three qubit genuine entanglement with bi-partite positive partial transposes
Kil-Chan Ha, Seung-Hyeok Kye
We construct tri-qubit genuinely entangled states which have positive partial transposes with respect to bi-partition of systems. These examples disprove a conjecture [L. Novo, T.…
Multi-partite separable states with unique decompositions and construction of three qubit entanglement with positive partial transpose
Kil-Chan Ha, Seung-Hyeok Kye
We investigate conditions on a finite set of multi-partite product vectors for which separable states with corresponding product states have unique decomposition, and show that thi…
Global geometric difference between separable and Positive partial transpose states
Kil-Chan Ha, Seung-Hyeok Kye
In the convex set of all $3\ot 3$ states with positive partial transposes, we show that one can take two extreme points whose convex combinations belong to the interior of the conv…
Geometry for separable states and construction of entangled states with positive partial transposes
Kil-Chan Ha, Seung-Hyeok Kye
We construct faces of the convex set of all bipartite separable states, which are affinely isomorphic to the simplex with ten extreme points. Every interior po…