Nonclassical correlations from randomly chosen local measurements

Yeong Cherng Liang, Nicholas Harrigan, Stephen D. Bartlett, Terry Rudolph

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We show that correlations inconsistent with any locally causal description can be a generic feature of measurements on entangled quantum states. Specifically, spatially separated parties who perform local measurements on a maximally entangled state using randomly chosen measurement bases can, with significant probability, generate nonclassical correlations that violate a Bell inequality. For n parties using a Greenberger-Horne-Zeilinger state, this probability of violation rapidly tends to unity as the number of parties increases. We also show that, even with both a randomly chosen two-qubit pure state and randomly chosen measurement bases, a violation can be found about 10% of the time. Among other applications, our work provides a feasible alternative for the demonstration of Bell inequality violation without a shared reference frame.

Original languageEnglish
Article number050401
JournalPhysical review letters
Volume104
Issue number5
DOIs
Publication statusPublished - 2010 Feb 2

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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