A lower bound of concurrence for multipartite quantum systems
Quantum Physics
2018-01-03 v1
Abstract
We present a lower bound of concurrence for four-partite systems in terms of the concurrence for part quantum systems and give an analytical lower bound for mixed quantum sates. It is shown that these lower bounds are able to improve the existing bounds and detect entanglement better. Furthermore, our approach can be generalized to multipartite quantum systems.
Keywords
Cite
@article{arxiv.1801.00078,
title = {A lower bound of concurrence for multipartite quantum systems},
author = {Xue-Na Zhu and Ming Li and Shao-Ming Fei},
journal= {arXiv preprint arXiv:1801.00078},
year = {2018}
}
Comments
9 pages,2 figures