Faithful test of nonlocal realism with entangled coherent states

C.W. Lee, Mauro Paternostro, H. Jeong

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We investigate the violation of Leggett's inequality for nonlocal realism using entangled coherent states and various types of local measurements. We prove mathematically the relation between the violation of the Clauser-Horne-Shimony-Holt form of Bell's inequality and Leggett's one when tested by the same resources. For Leggett inequalities, we generalize the nonlocal realistic bound to systems in Hilbert spaces larger than bidimensional ones and introduce an optimization technique that allows one to achieve larger degrees of violation by adjusting the local measurement settings. Our work describes the steps that should be performed to produce a self-consistent generalization of Leggett's original arguments to continuous-variable states.
Original languageEnglish
Article number022102
Pages (from-to)022102
Number of pages1
JournalPhysical Review A
Issue number2
Publication statusPublished - 08 Feb 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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