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Persistency of entanglement and nonlocality in multipartite quantum systems

Vértesi, Tamás
Published in Physical Review. A. 2012, vol. 86, no. 4
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.
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BRUNNER, Nicolas, VÉRTESI, Tamás. Persistency of entanglement and nonlocality in multipartite quantum systems. In: Physical Review. A, 2012, vol. 86, n° 4. https://archive-ouverte.unige.ch/unige:36419

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Deposited on : 2014-05-06

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