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- W4367673637 abstract "We analyze the evolution of Holevo and entanglement-assisted classical capacities for a special class of phase-covariant channels. In particular, we show that these capacities can be improved by changing the stationary state of the channel, which is closely related to its non-unitality degree. The more non-unital the channel, the greater its capacity. The channel parameters are engineered through mixtures on the level of dynamical maps, time-local generators, and memory kernels, for which we propose construction methods. For highly non-unital maps, we achieve a temporary increase in the classical capacity that exceeds the entanglement-assisted classical capacity of the unital map. This shows that non-unitality can become a better quantum resource for information transition purposes than quantum entanglement." @default.
- W4367673637 created "2023-05-03" @default.
- W4367673637 creator A5054647169 @default.
- W4367673637 date "2023-05-11" @default.
- W4367673637 modified "2023-10-01" @default.
- W4367673637 title "Improving classical capacity of qubit dynamical maps through stationary state manipulation" @default.
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- W4367673637 doi "https://doi.org/10.1088/1751-8121/acd1c7" @default.
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