title: Classical simulation of entanglement swapping with bounded communication.
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.
authors.affiliation: School of Mathematics and Physics, The University of Queensland, St Lucia, QLD 4072, Australia.
authors.forename: Cyril
authors.initials: C
authors.lastname: Branciard
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brunner
authors.forename: Harry
authors.initials: H
authors.lastname: Buhrman
authors.forename: Richard
authors.initials: R
authors.lastname: Cleve
authors.forename: Nicolas
authors.initials: N
authors.lastname: Gisin
authors.forename: Samuel
authors.initials: S
authors.lastname: Portmann
authors.forename: Denis
authors.initials: D
authors.lastname: Rosset
authors.forename: Mario
authors.initials: M
authors.lastname: Szegedy