60 citations · 364 across the 22 of their papers we have counts for
22 papers
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.…
Construction of exposed indecomposable positive linear maps between matrix algebras
Kil-Chan Ha, Seung-Hyeok Kye
We construct a large class of indecomposable positive linear maps from the matrix algebra into the matrix algebra, which generate exposed extreme rays of th…
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…