1208.1745 (Xue-Na Zhu et al.)

Lower Bound of Multipartite Concurrence Based on Sub-quantum State
Decomposition    [PDF]

Xue-Na Zhu, Ming-Jing Zhao, Shao-Ming Fei

We study the entanglement of tripartite quantum states and provide analytical lower bound of concurrence in terms of the concurrence of sub-states. The lower bound may improve all the existing lower bounds of concurrence. The approach is generalized to arbitrary dimensional multipartite systems.

View original: http://arxiv.org/abs/1208.1745