Entangled states cannot be classically simulated in generalized Bell experiments with quantum inputs

Denis Rosset, Cyril Branciard, Nicolas Gisin, Yeong Cherng Liang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Simulation tasks are insightful tools to compare information-theoretic resources. Considering a generalization of usual Bell scenarios where external quantum inputs are provided to the parties, we show that any entangled quantum state exhibits correlations that cannot be simulated using only shared randomness and classical communication, even when the amount and rounds of classical communication involved are unrestricted. We indeed construct explicit Bell-like inequalities that are necessarily satisfied by such classical resources but nevertheless violated by correlations obtainable from entangled quantum states, when measured a single copy at a time.

Original languageEnglish
Article number053025
JournalNew Journal of Physics
Volume15
DOIs
Publication statusPublished - 2013 May

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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