Probing Bell's inequality with classical systems

D. K. Ferry

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


From the early days of quantum mechanics, there has been a discussion on the concept of reality, exemplified by the EPR paradox. To many, the idea of the paradox and the possibility of local hidden variables was dismissed by the Bell inequality. Yet, there remains considerable evidence that this inequality can be violated even by classical systems, so that experiments showing quantum behavior and the violation of the inequality must be questioned. Here, we demonstrate that classical optical polarization experiments can be shown to violate the Bell inequality. Hence, such experiments cannot be used to distinguish between classical and quantum theories.

Original languageEnglish (US)
Pages (from-to)395-402
Number of pages8
JournalFluctuation and Noise Letters
Issue number4
StatePublished - Dec 1 2010


  • Bell inequality
  • EPR paradox
  • quantum mechanics

ASJC Scopus subject areas

  • Mathematics(all)
  • Physics and Astronomy(all)


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