Persistency of entanglement and nonlocality in multipartite quantum systems

Nicolas Brunner*, Tamas Vertesi

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

13 Citations (Scopus)

Abstract

The behavior under particle loss of entanglement and nonlocality is investigated in multipartite quantum systems. In particular, we define a notion of persistency of nonlocality, which leads to device-independent tests of persistent entanglement. We investigate the persistency of various classes of multipartite quantum states, exhibiting a variety of different behaviors. A particular attention is devoted to states featuring maximal persistency. Finally we discuss a link between the symmetry of a state and its persistency, illustrating the fact that too much symmetry reduces the strength of correlations among subsystems. These ideas also lead to a device-independent estimation of the asymmetry of a quantum state.

Original languageEnglish
Article number042113
Number of pages6
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Volume86
Issue number4
DOIs
Publication statusPublished - 12 Oct 2012

Keywords

  • HIDDEN NONLOCALITY
  • STATES

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