Bounds on Multipartite Concurrence and Tangle

Jing Wang, Ming Li, Hongfang Li, Shao-Ming Fei, and Xianqing Li-Jost

Contact the author: Please use for correspondence this email.
Submission date: 05. Aug. 2016
Pages: 12
published in: Quantum information processing, 15 (2016) 10, p. 4211-4218 
DOI number (of the published article): 10.1007/s11128-016-1385-x
Bibtex
Download full preprint: PDF (122 kB)

Abstract:
We present an analytical lower bound of multipartite concurrence based on the generalized Bloch representation of density matrices. It is shown that the lower bound can be used as an effective entanglement witness of genuine multipartite entanglement. Tight lower and upper bounds for multipartite tangles are also derived.