Detection of multipartite entanglement via quantum Fisher information

• URL: http://arxiv.org/abs/2103.07141v1
• Date: Fri, 12 Mar 2021 08:28:12 GMT
• Title: Detection of multipartite entanglement via quantum Fisher information
• Authors: Yan Hong, Xianfei Qi, Ting Gao, Fengli Yan
• Abstract summary: We focus on two different kinds of multipartite correlation, $k$-nonseparability and $k$-partite entanglement. We propose effective methods to detect $k$-nonseparability and $k$-partite entanglement in terms of quantum Fisher information.
• Score: 1.345821655503426
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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