Two-way and three-way negativities of three qubit entangled states

Details Two-way and three-way negativities of three qubit entangled states Two-way and three-way negativities of three qubit entangled states

2006-09-03

arxiv.org/abs/quant-ph/0609012v3

Phys. Rev. A 76, 012326 (2007).

Physics

Quantum Physics

07 pages, 04 figures, References added, text revised and figures revised

Scientific paper

10.1103/PhysRevA.76.012326

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.

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