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- W3098016880 abstract "A triple trade-off capacity region of a noisy quantum channel provides a more complete description of its capabilities than does a single capacity formula. However, few full descriptions of a channel's ability have been given due to the difficult nature of the calculation of such regions---it may demand an optimization of information-theoretic quantities over an infinite number of channel uses. This work analyzes the d-dimensional Unruh channel, a noisy quantum channel which emerges in relativistic quantum information theory. We show that this channel belongs to the class of quantum channels whose capacity region requires an optimization over a single channel use, and as such is tractable. We determine two triple-trade off regions, the quantum dynamic capacity region and the private dynamic capacity region, of the d-dimensional Unruh channel. Our results show that the set of achievable rate triples using this coding strategy is larger than the set achieved using a time-sharing strategy. Furthermore, we prove that the Unruh channel has a distinct structure made up of universal qudit cloning channels, thus providing a clear relationship between this relativistic channel and the process of stimulated emission present in quantum optical amplifiers." @default.
- W3098016880 created "2020-11-23" @default.
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- W3098016880 date "2011-09-23" @default.
- W3098016880 modified "2023-10-16" @default.
- W3098016880 title "Trade-off coding for universal qudit cloners motivated by the Unruh effect" @default.
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- W3098016880 doi "https://doi.org/10.1088/1751-8113/44/41/415306" @default.
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