Two-way and three-way negativities of three qubit entangled states
Quantum Physics
2009-11-13 v3
Abstract
We propose to quantify three qubit entanglement using global negativity along with K-way negativities, where K=2 and 3. K-way partial transpose with respect to a subsystem is defined so as to shift the focus to K-way coherences of the composite system instead of K subsystems of the composite system. While genuine tripartite entanglement of three qubit composite system is generated by 3-way coherences, tripartite entanglement can be present due to 2-way coherences as well.
Keywords
Cite
@article{arxiv.quant-ph/0609012,
title = {Two-way and three-way negativities of three qubit entangled states},
author = {S. Shelly Sharma and N. K. Sharma},
journal= {arXiv preprint arXiv:quant-ph/0609012},
year = {2009}
}
Comments
07 pages, 04 figures, References added, text revised and figures revised