학술저널
AN ALGORITHM FOR CHECKING EXTREMALITY OF ENTANGLED STATES WITH POSITIVE PARTIAL TRANSPOSES
- 충청수학회
- Journal of the Chungcheong Mathematical Society
- Volume 23, No. 4
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2010.12609 - 616 (8 pages)
- 9
We characterize extreme rays of the cone T of all pos- itive semi-de¯nite block matrices whose partial transposes are also positive semi-de¯nite. We also construct an algorithm checking whether a given PPTES generates an extreme ray in the cone T or not. Using this algorithm, we give an example of 4 4 PPT entangle state of the type (5; 5), which generates extreme ray of the cone T
1. Introduction
2. Characterization of extremal PPTES
3. An algorithm for checking the extremality of PPTES
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