Informação Acessível Erro-Zero de Fontes Quânticas

Elloá B. Guedes, Francisco M. de Assis

DOI: 10.14209/sbrt.2013.223

Evento: XXXI Simpósio Brasileiro de Telecomunicações (SBrT2013)

Keywords: Quantum Zero-Error Information Theory; Accessible Information; Quantum Source; Holevo Bound.

Abstract

We introduce a new concept called zero-error accessible information of a quantum source which measures the amount of information shared by two parties, one which has a quantum source, and the other which uses a measurement scheme to decode the quantum states received, upon the restriction that no decoding errors must occur. No general method to obtain the accessible information in a general quantum scenario is known and due to that the Holevo upper bound is widely used. However, in the zero-error scenario described, it is possible to determine a closed formula for such measure which coincides with the classical zero-error capacity of an equivalent discrete memoryless channel. The results described increase the understading of Quantum Zero-Error Information Theory and its particularities.

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