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arXiv:2409.18727 · Physical Review A

Quantifying genuine tripartite entanglement by reshaping the state

Dong-Dong Dong, Li-Juan Li, Xue‐Ke Song, Liu Ye, Dong Wang

Published Sep 17, 2024• 16 citations
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Abstract

Although genuine multipartite entanglement (GME), as one quantum resource, is indispensable in quantum information processing, most of the existing measures cannot detect GME faithfully. In this paper we present a GME measure, namely, the minimum pairwise concurrence (MPC), by introducing pairwise entanglement, which characterizes the entanglement between two single-qubit subsystems of a multipartite system without tracing out the remaining qubit. The pairwise entanglement can be obtained by combining the entanglement of the reduced subsystem and the three-tangle. Compared with existing measures, the MPC measure outperforms the previous ones in many aspects. Due to its fine properties, it thus is believed that the MPC could be a good candidate for achieving potential quantum tasks and also could facilitate the understanding of GME.

DOI
10.1103/physreva.110.032420

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