Nonlocality of two- and three-mode continuous variable systems

A Ferraro*, MGA Paris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

We address the nonlocality of fully inseparable three-mode Gaussian states generated either by bilinear three-mode Hamiltonians or by a sequence of bilinear two-mode Hamiltonians. Two different tests revealing nonlocality are considered, in which the dichotomic Bell operator is represented by the displaced parity and by the pseudospin operator respectively. Three-mode states are also considered as a conditional source of two-mode non-Gaussian states, whose nonlocality properties are analysed. We found that the non-Gaussian character of the conditional states allows violation of Bell's inequalities (by parity and pseudospin tests) stronger than with a conventional twin-beam state. However, the non-Gaussian character is not sufficient to reveal nonlocality through a dichotomized quadrature measurement strategy.

Original languageEnglish
Pages (from-to)174-182
Number of pages9
JournalJournal of optics b-Quantum and semiclassical optics
Volume7
Issue number6
DOIs
Publication statusPublished - Jun 2005

Keywords

  • nonlocality
  • Bell's inequalities
  • continuous variables
  • QUANTUM TELEPORTATION NETWORK
  • BELL-INEQUALITY
  • COHERENT STATES
  • ENTANGLEMENT
  • VIOLATION
  • REPRESENTATION

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