Correlation tensor criteria for genuine multiqubit entanglement
Quantum Physics
2015-05-30 v2
Abstract
We present a development of a geometric approach to entanglement indicators. The method is applied to detect genuine multiqubit entanglement. The criteria are given in form of non-linear conditions imposed on correlation tensors. Thus they involve directly observable quantities, and in some cases require only few specific measurements to find multiqubit entanglement. The non-linearity of each of the criteria allows detection of entanglement in wide classes of states. In contrast to entanglement witnesses, which in the space of Hermitian operators define a hyperplane, the new conditions define a geometric figure encapsulating the non-fully entangled states within it.
Cite
@article{arxiv.1110.4108,
title = {Correlation tensor criteria for genuine multiqubit entanglement},
author = {Wieslaw Laskowski and Marcin Markiewicz and Tomasz Paterek and Marek Zukowski},
journal= {arXiv preprint arXiv:1110.4108},
year = {2015}
}
Comments
8 pages, 1 figure, journal version