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24 April 2024

» arxiv » 1203.0445

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Classical simulation of entanglement swapping with bounded communication
Cyril Branciard ; Nicolas Brunner ; Harry Buhrman ; Richard Cleve ; Nicolas Gisin ; Samuel Portmann ; Denis Rosset ; Mario Szegedy ;
Date:	2 Mar 2012
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, this process 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 process of entanglement swapping.
Source:	arXiv, 1203.0445
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