Projection based lower bounds of concurrence for multipartite quantum systems
Quantum Physics
2020-06-16 v1
Abstract
We study the concurrence of arbitrary-dimensional multipartite quantum states. Analytical lower bounds of concurrence for tripartite quantum states are derived by projecting high-dimensional states to substates. The results are then generalized to arbitrary multipartite quantum systems. Furthermore, the scheme enables us obtain lower bounds of concurrence for arbitrary four-partite quantum states by projecting high-dimensional states to arbitrary given lower dimensional substates. By detailed examples we show that our results improve the existing lower bounds of concurrence.
Cite
@article{arxiv.2004.13269,
title = {Projection based lower bounds of concurrence for multipartite quantum systems},
author = {Hui Zhao and MeiMing Zhang and Shao-Ming Fei and Naihuan Jing},
journal= {arXiv preprint arXiv:2004.13269},
year = {2020}
}
Comments
13pages, 2figures