Repeatable quantum memory channels

Within the framework of quantum memory channels we introduce the notion of repeatability of quantum channels. In particular, a quantum channel is called repeatable if there exist a memory device implementing the same channel on each individual input. We show that random unitary channels can be imple...

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Bibliographic Details
Published in:arXiv.org 2008-08
Main Authors: Rybar, Tomas, Ziman, Mário
Format: Article
Language:English
Subjects:
Channels
Memory devices
Quantum phenomena
Online Access:Get full text
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Summary:Within the framework of quantum memory channels we introduce the notion of repeatability of quantum channels. In particular, a quantum channel is called repeatable if there exist a memory device implementing the same channel on each individual input. We show that random unitary channels can be implemented in a repeatable fashion, whereas the nonunital channels cannot.
ISSN:2331-8422
DOI:10.48550/arxiv.0808.3851