Repeatable quantum memory channels

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Authors

ZIMAN Mário RYBÁR Tomáš

Year of publication 2008
Type Article in Periodical
Magazine / Source Phys. Rev. A
MU Faculty or unit

Faculty of Informatics

Citation
Web http://arxiv.org/abs/0808.3851
Field Informatics
Keywords Repeatable quantum memory channels
Description 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.
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