Volume 134, Number 6, June 2021
|Number of page(s)||5|
|Published online||03 September 2021|
Detection of multipartite entanglement via quantum Fisher information
1 School of Mathematics and Science, Hebei GEO University - 050031 Shijiazhuang, China
2 School of Mathematics and Statistics, Shangqiu Normal University - 476000 Shangqiu, China
3 School of Mathematical Sciences, Hebei International Joint Research Center for Mathematics and Interdisciplinary Science, Hebei Key Laboratory of Computational Mathematics and Applications, Hebei Normal University - 050024 Shijiazhuang, China
4 College of Physics, Hebei Normal University - 050024 Shijiazhuang, China
Received: 23 February 2021
Accepted: 3 April 2021
In this paper, we focus on two different kinds of multipartite correlation, k-nonseparability and k-partite entanglement, both of which can describe the essential characteristics of multipartite entanglement. We propose effective methods to detect k-nonseparability and k-partite entanglement in terms of quantum Fisher information. We illustrate the significance of our results and show that they identify some k-nonseparability and k-partite entanglement that cannot be identified by known criteria by several concrete examples.
© 2021 EPLA
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