Detection of multipartite entanglement via quantum Fisher information
Y Hong, X Qi, T Gao, F Yan - Europhysics Letters, 2021 - iopscience.iop.org
Y Hong, X Qi, T Gao, F Yan
Europhysics Letters, 2021•iopscience.iop.orgIn 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.
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.
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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