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Channel capacities via p-summing norms



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Junge, Marius and Palazuelos Cabezón, Carlos (2015) Channel capacities via p-summing norms. Advances in Mathematics, 272 . pp. 350-398. ISSN 0001-8708


Official URL: http://www.sciencedirect.com/science/article/pii/S0001870814004265



In this paper we show how the metric theory of tensor products developed by Grothendieck perfectly fits in the study of channel capacities, a central topic in Shannon’s information theory. Furthermore, in the last years Shannon’s theory has been fully generalized to the quantum setting, and revealed qualitatively new phenomena in comparison. In this paper we consider the classical capacity of quantum channels with restricted assisted entanglement. These capacities include the classical capacity and the unlimited entanglement-assisted classical capacity of a quantum channel. Our approach to restricted capacities is based on tools from functional analysis, and in particular the notion of p-summing maps going back to Grothendieck’s work. Pisier’s noncommutative vector-valued Lp spaces allow us to establish the new connection between functional analysis and information theory in the quantum setting.

Item Type:Article
Uncontrolled Keywords:Operator spaces, Completely p-summing maps, Quantum information theory, Quantum channels
Subjects:Sciences > Physics > Quantum theory
ID Code:27986
Deposited On:13 Feb 2015 13:32
Last Modified:06 Mar 2015 08:28

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