We show that a special type of measurements, called symmetric informationally complete positive operator-valued measures (SIC POVMs), provide a stronger entanglement detection criterion than the computable cross-norm or realignment criterion based on local orthogonal observables. As an illustration, we demonstrate the enhanced entanglement detection power in simple systems of qubit and qutrit pairs. This observation highlights the significance of SIC POVMs for entanglement detection.
@article{arxiv.1805.03955,
title = {Enhanced entanglement criterion via symmetric informationally complete measurements},
author = {Jiangwei Shang and Ali Asadian and Huangjun Zhu and Otfried Gühne},
journal= {arXiv preprint arXiv:1805.03955},
year = {2018}
}
Comments
final version, 7 pages, 6 figures, 32 references; published in PRA as an Editors' Suggestion