Conditions for entanglement in multipartite systems
Quantum Physics
2015-05-19 v1
Abstract
We introduce two entanglement conditions that take the form of inequalities involving expectation values of operators. These conditions are sufficient conditions for entanglement, that is if they are satisfied the state is entangled, but if they are not, one can say nothing about the entanglement of the state. These conditions are quite flexible, because the operators in them are not specified, and they are particularly useful in detecting multipartite entanglement. We explore the range of utility of these conditions by considering a number of examples of entangled states, and seeing under what conditions entanglement in them can be detected by the inequalities presented here.
Cite
@article{arxiv.1005.4453,
title = {Conditions for entanglement in multipartite systems},
author = {Mark Hillery and Ho Trung Dung and Hongjun Zheng},
journal= {arXiv preprint arXiv:1005.4453},
year = {2015}
}
Comments
accepted for publication in Physical Review A