2014.03.24 18:34
실적년도 | 2010 년 |
---|---|
논문구분 | 국외 |
총저자 | Kil-Chan Ha, Seung H |
학술지명 | Open Systems & Information Dynamics |
권(Vol.) | 18 |
호(No.) | 4 |
게재년월 | 년 월 |
Impact Factor | |
SCI 등재 | |
비고 |
Entanglement witnesses arising from exposed positive linear maps
by Kil-Chan Ha and Seung-Hyeok Kye
Open Syst. Inf. Dyn. 18 (2011), 323-337.
We consider entanglement witnesses arising from positive linear maps which generate exposed extremal rays. We show that every entanglement can be detected by one of these witnesses, and this witness detects a unique set of entanglement among those. Therefore, they provide a minimal set of witnesses to detect all entanglement in a sense. Furthermore, if those maps are indecomposable then they detect large classes of entanglement with positive partial transposes which have nonempty relative interiors in the cone generated by all PPT states. We also provide a one parameter family of indecomposable positive linear maps which generate exposed extremal rays. This gives the first examples of such maps between three dimensional matrix algebra.