Quantum enhancement of randomness distribution
Garcia-Patron, Raul (Université Libre de Bruxelles)
Matthews, William (University of Cambridge. Department of Applied Mathematics Theoretical Physics)
Winter, Andreas (Universitat Autònoma de Barcelona. Departament de Física)

Imprint:	Dagstuhl : Leibniz-Zentrum fuer Informatik, 2015
Abstract:	The capability of a given channel to transmit information is, a priori, distinct from its capability to distribute random correlations. Despite that, for classical channels, the capacity to distribute information and randomness turns out to be the same, even with the assistance of auxiliary communication. In this work we show that this is no longer true for quantum channels when feedback is allowed. We prove this by constructing a channel that is noisy for the transmission of information but behaves as a virtual noiseless channel for randomness distribution when assisted by feedback communication. Our result can be seen as a way of unlocking quantum randomness internal to the channel.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Series:	Leibniz International Proceedings in Informatics (LIPIcs) ; 44
Document:	Capítol de llibre ; recerca ; Versió publicada
Subject:	Quantum Shannon theory ; Noisy channels ; Capacity ; Randomness
Published in:	10th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2015), 2015, p. 180-190, ISBN 978-3-939897-96-5

DOI: 10.4230/LIPIcs.TQC.2015.180

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