Classical communication cost of quantum steering

Ana Belen Sainz, Leandro Aolita, Nicolas Brunner, Rodrigo Gallego, Paul Skrzypczyk

Research output: Contribution to journalArticle (Academic Journal)peer-review

13 Citations (Scopus)
299 Downloads (Pure)

Abstract

Quantum steering is observed when performing appropriate local measurements on an entangled state. Here we discuss the possibility of simulating classically this effect, using classical communication instead of entanglement. We show that infinite communication is necessary for exactly simulating steering for any pure entangled state, as well as for a class of mixed entangled states. Moreover, we discuss the communication cost of steering for general entangled states, as well as approximate simulation. Our findings reveal striking differences between Bell nonlocality and steering and provide a natural way of measuring the strength of the latter.
Original languageEnglish
Article number012308
Number of pages8
JournalPhysical Review A
Volume94
DOIs
Publication statusPublished - 6 Jul 2016

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