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Content Provider | IEEE Xplore Digital Library |
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Author | Cubitt, T.S. Smith, G. |
Copyright Year | 1963 |
Abstract | The zero-error capacity of a channel is the rate at which it can send information perfectly, with zero probability of error, and has long been studied in classical information theory. We show that the zero-error capacity of quantum channels exhibits an extreme form of nonadditivity, one which is not possible for classical channels, or even for the usual capacities of quantum channels. By combining probabilistic arguments with algebraic geometry, we prove that there exist channels and with no zero-error classical capacity whatsoever, , but whose joint zero-error quantum capacity is positive, . This striking effect is an extreme form of the superactivation phenomenon, as it implies that both the classical and quantum zero-error capacities of these channels can be superactivated simultaneously, while being a strictly stronger property of capacities. Superactivation of the quantum zero-error capacity was not previously known. |
Sponsorship | IEEE Information Theory Society |
Starting Page | 1953 |
Ending Page | 1961 |
Page Count | 9 |
File Size | 223327 |
File Format | |
ISSN | 00189448 |
Volume Number | 58 |
Issue Number | 3 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2012-03-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Quantum mechanics Joints Channel capacity Geometry Vectors Capacity planning zero-error capacity Additivity violation channel coding classical capacity communication channels information rates quantum capacity quantum theory superactivation |
Content Type | Text |
Resource Type | Article |
Subject | Library and Information Sciences Information Systems Computer Science Applications |
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