期刊
REPORTS ON MATHEMATICAL PHYSICS
卷 71, 期 2, 页码 163-175出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0034-4877(13)60027-0
关键词
entanglement witness; positive map
资金
- National Science Center [DEC-2011/03/B/ST2/00136]
We provide a novel tool which may be used to construct new examples of positive maps in matrix algebras (or, equivalently, entanglement witnesses). It turns out that this can be used to prove positivity of several well-known maps (such as reduction map, generalized reduction, Robertson map, and many others). Furthermore, we use it to construct a new family of linear maps and prove that they are positive, indecomposable and (nd)optimal.
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