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2013 | 11 | 1 | 69-77
Tytuł artykułu

Notes on entropic characteristics of quantum channels

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
One of most important issues in quantum information theory concerns transmission of information through noisy quantum channels. We discuss a few channel characteristics expressed by means of generalized entropies. Such characteristics can often be treated in line with more usual treatment based on the von Neumann entropies. For any channel, we show that the q-average output entropy of degree q ≥ 1 is bounded from above by the q-entropy of the input density matrix. The concavity properties of the (q, s)-entropy exchange are considered. Fano type quantum bounds on the (q, s)-entropy exchange are derived. We also give upper bounds on the map (q, s)-entropies in terms of the output entropy, corresponding to the completely mixed input.
Wydawca

Czasopismo
Rocznik
Tom
11
Numer
1
Strony
69-77
Opis fizyczny
Daty
wydano
2013-01-01
online
2013-01-15
Twórcy
  • Department of Theoretical Physics, Irkutsk State University Irkutsk, Gagarin Bv. 20, 664003, Irkutsk, Russia, rast@api.isu.ru
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-012-0134-8
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