Violation of Bell's inequalities with preamplified homodyne detection

G. Torlai*, G. McKeown, P. Marek, R. Filip, H. Jeong, M. Paternostro, G. De Chiara

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

We show that the use of probabilistic noiseless amplification in entangled coherent state-based schemes for the test of quantum nonlocality provides substantial advantages. The threshold amplitude to falsify a Bell-CHSH nonlocality test, in fact, is significantly reduced when amplification is embedded into the test itself. Such a beneficial effect holds also in the presence of detection inefficiency. Our study helps in affirming noiseless amplification as a valuable tool for coherent information processing and the generation of strongly nonclassical states of bosonic systems.

Original languageEnglish
Article number052112
Number of pages6
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume87
Issue number5
DOIs
Publication statusPublished - 10 May 2013

Keywords

  • QUANTUM NONLOCALITY
  • COHERENT STATES
  • ENTANGLEMENT
  • NOISE

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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