Scientific Results

Role of Particle Entanglement in the Violation of Bell Inequalities

Year: 2018

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

Autors Affiliation: [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.

Abstract: 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: 8      Pages from: 1777-1  to: 1777-6

KeyWords: hidden-variable theories; quantum nonlocality; photons; states;
DOI: 10.1038/s41598-018-20034-8

Citations: 3
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-24
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more