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Popescu-Rohrlich Correlations as a Unit of Nonlocality

Barrett, Jonathan and Pironio, Stefano (2005) Popescu-Rohrlich Correlations as a Unit of Nonlocality. Physical Review Letters, 95 (14). Art. no. 140401. ISSN 0031-9007. doi:10.1103/PhysRevLett.95.140401.

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A set of nonlocal correlations that have come to be known as a Popescu-Rohrlich (PR) box suggest themselves as a natural unit of nonlocality, much as a singlet is a natural unit of entanglement. We present two results relevant to this idea. One is that a wide class of multipartite correlations can be simulated using local operations on PR boxes only. We show this with an explicit scheme, which has the interesting feature that the number of PR boxes required is related to the computational resources necessary to represent a function defining the multipartite box. The second result is that there are quantum multipartite correlations, arising from measurements on a cluster state, that cannot be simulated with n PR boxes, for any n.

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Additional Information:©2005 The American Physical Society (Received 27 June 2005; published 29 September 2005) S. P. acknowledges support by the David and Alice van Buuren Foundation, the Belgian American Educational Foundation, and the National Science Foundation under Grant No. EIA-0086038.
Subject Keywords:quantum communication
Issue or Number:14
Record Number:CaltechAUTHORS:BARprl05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1833
Deposited By: Archive Administrator
Deposited On:20 Feb 2006
Last Modified:08 Nov 2021 19:42

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