On approximation of quantum channels

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dc.creatorShirokov, M. E.
dc.creatorHolevo, A. S.
dc.date2007-11-14
dc.date.accessioned2026-07-07T12:13:13Z
dc.date.available2026-07-07T12:13:13Z
dc.descriptionWe develop an approximation approach to infinite dimensional quantum channels based on detailed investigation of the continuity properties of entropic characteristics of quantum channels and operations (trace-nonincreasing completely positive maps) as functions of a pair ``channel, input state''. The obtained results are then applied to the following problems: continuity of the $χ$-capacity as function of a channel; strong additivity of the $χ$-capacity for infinite dimensional channels; the analytical expression for the convex closure of the output entropy of arbitrary quantum channel.
dc.description26 pages
dc.identifierhttps://arxiv.org/abs/0711.2245
dc.identifierhttp://arxiv.org/abs/0711.2245
dc.identifierProblems of Information Transmission, Vol. 44, No. 2, (2008), 3-22
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210770
dc.subjectQuantum Physics
dc.titleOn approximation of quantum channels
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