Hardy's Paradox and Violation of a State-Independent Bell Inequality in Time

Alessandro Fedrizzi, Marcelo P. Almeida, Matthew A. Broome, Andrew G. White, Marco Barbieri

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Tests such as Bell's inequality and Hardy's paradox show that joint probabilities and correlations between distant particles in quantum mechanics are inconsistent with local realistic theories. Here we experimentally demonstrate these concepts in the time domain, using a photonic entangling gate to perform nondestructive measurements on a single photon at different times. We show that Hardy's paradox is much stronger in time and demonstrate the violation of a temporal Bell inequality independent of the quantum state, including for fully mixed states.

Original languageEnglish
Article number200402
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number20
DOIs
Publication statusPublished - 20 May 2011

Keywords

  • QUANTUM-MECHANICS
  • HIDDEN VARIABLES
  • ENTANGLED STATES
  • NONLOCALITY

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