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Role of Particle Entanglement in the Violation of Bell Inequalities

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Wasak T., Smerzi A., Chwedenczuk J

Affiliazione Autori:  [Wasak, Tomasz; Chwedenczuk, Jan] Univ Warsaw, Fac Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland. [Smerzi, Augusto] CNR, INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy and LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy.

Riassunto:  Entanglement between two separate systems is a necessary resource to violate a Bell inequality in a test of local realism. We demonstrate that to overcome the Bell bound, this correlation must be accompanied by the entanglement between the constituent particles. This happens whenever a super-selection rule prohibits coherences between states with different total number of particles and thus imposes a constraint on feasible local operations in each sub-system. We show that the necessary entanglement between the particles might solely result from their indistinguishability. We also give an example of both mode and particle-entangled pure state, which does not violate any Bell inequality. Our result reveals a fundamental relation between the non-locality and the particle entanglement.

Volume n.:  8      Pagine da: 1777-1  a: 1777-6
DOI: 10.1038/s41598-018-20034-8

   *Citazioni: 1
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  14/07/2019

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