Classical simulation of entanglement swapping with bounded communication

Entanglement appears under two different forms in quantum theory, namely, as a property of states of joint systems and as a property of measurement eigenstates in joint measurements. By combining these two aspects of entanglement, it is possible to generate nonlocality between particles that never i...

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Published inPhysical review letters Vol. 109; no. 10; p. 100401
Main Authors Branciard, Cyril, Brunner, Nicolas, Buhrman, Harry, Cleve, Richard, Gisin, Nicolas, Portmann, Samuel, Rosset, Denis, Szegedy, Mario
Format Journal Article
LanguageEnglish
Published United States 07.09.2012
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Abstract Entanglement appears under two different forms in quantum theory, namely, as a property of states of joint systems and as a property of measurement eigenstates in joint measurements. By combining these two aspects of entanglement, it is possible to generate nonlocality between particles that never interacted, using the protocol of entanglement swapping. We show that even in the more constraining bilocal scenario where distant sources of particles are assumed to be independent, i.e., to share no prior randomness, entanglement swapping can be simulated classically with bounded communication, using only 9 bits in total. Our result thus provides an upper bound on the nonlocality of the entanglement swapping process.
AbstractList Entanglement appears under two different forms in quantum theory, namely, as a property of states of joint systems and as a property of measurement eigenstates in joint measurements. By combining these two aspects of entanglement, it is possible to generate nonlocality between particles that never interacted, using the protocol of entanglement swapping. We show that even in the more constraining bilocal scenario where distant sources of particles are assumed to be independent, i.e., to share no prior randomness, entanglement swapping can be simulated classically with bounded communication, using only 9 bits in total. Our result thus provides an upper bound on the nonlocality of the entanglement swapping process.
Author Brunner, Nicolas
Gisin, Nicolas
Szegedy, Mario
Portmann, Samuel
Branciard, Cyril
Buhrman, Harry
Rosset, Denis
Cleve, Richard
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/23005265$$D View this record in MEDLINE/PubMed
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Title Classical simulation of entanglement swapping with bounded communication
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