Lower Bound of Concurrence for Qubit Systems
Quantum Physics
2014-02-11 v2
Abstract
We study the concurrence of four-qubit quantum states and provide analytical lower bounds of concurrence in terms of the monogamy inequality of concurrence for qubit systems. It is shown that these lower bounds are able to improve the existing bounds and detect entanglement better. The approach is generalized to arbitrary qubit systems.
Cite
@article{arxiv.1401.0622,
title = {Lower Bound of Concurrence for Qubit Systems},
author = {Xue-Na Zhu and Shao-Ming Fei},
journal= {arXiv preprint arXiv:1401.0622},
year = {2014}
}
Comments
10 pages, 1 figures