Center-of-mass interpretation for bipartite purity analysis of N -party entanglement

Miguel A. Alonso, Xiao Feng Qian, J. H. Eberly

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18 Scopus citations

Abstract

We provide a graphical description of the entanglement of pure-state multiparty systems based on an analogy between a bipartite purity analysis and the centroid of a collection of point masses. This description applies to quantum systems with N parties, each with an arbitrary number of (discrete) states. The case of N qubits is highlighted for simplicity. This geometric description illustrates some of the restrictions in the form of inequalities that apply to entanglement in multiparty systems.

Original languageEnglish
Article number030303
JournalPhysical Review A
Volume94
Issue number3
DOIs
StatePublished - 20 Sep 2016

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