Universität zu Köln

Brask, J. B. and Chaves, R. (2017). Bell scenarios with communication. J. Phys. A-Math. Theor., 50 (9). S. 1 - 20. BRISTOL: IOP PUBLISHING LTD. ISSN 1751-8121

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Abstract

Classical and quantum physics provide fundamentally different predictions about experiments with separate observers that do not communicate, a phenomenon known as quantum nonlocality. This insight is a key element of our present understanding of quantum physics, and also enables a number of information processing protocols with security beyond what is classically attainable. Relaxing the pivotal assumption of no communication leads to new insights into the nature quantum correlations, and may enable new applications where security can be established under less strict assumptions. Here, we study such relaxations where different forms of communication are allowed. We consider communication of inputs, outputs, and of a message between the parties. Using several measures, we study how much communication is required for classical models to reproduce quantum or general no- signalling correlations, as well as how quantum models can be augmented with classical communication to reproduce no- signalling correlations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Brask, J. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chaves, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-236840
DOI:	10.1088/1751-8121/aa5840
Journal or Publication Title:	J. Phys. A-Math. Theor.
Volume:	50
Number:	9
Page Range:	S. 1 - 20
Date:	2017
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1751-8121
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language QUANTUM CORRELATIONS; INEQUALITIES; PRINCIPLE Multiple languages Physics, Multidisciplinary; Physics, Mathematical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23684