Entanglement distribution by an arbitrarily inept delivery service

Details Entanglement distribution by an arbitrarily inept delivery service Entanglement distribution by an arbitrarily inept delivery service

2005-04-15

arxiv.org/abs/quant-ph/0504112v3

Phys. Rev. A 72, 022330 (2005)

Physics

Quantum Physics

5 pages, 3 figures. v2 includes minor changes

Scientific paper

10.1103/PhysRevA.72.022330

We consider the scenario where a company C manufactures in bulk pure entangled pairs of particles, each pair intended for a distinct pair of distant customers. Unfortunately, its delivery service is inept - the probability that any given customer pair receives its intended particles is S, and the customers cannot detect whether an error has occurred. Remarkably, no matter how small S is, it is still possible for C to distribute entanglement by starting with non-maximally entangled pairs. We determine the maximum entanglement distributable for a given S, and also determine the ability of the parties to perform nonlocal tasks with the qubits they receive.

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