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- W3098032907 abstract "We construct a new entanglement-assisted quantum polar coding scheme which achieves the symmetric coherent information rate by synthesizing amplitude and phase channels from a given, arbitrary quantum channel. We first demonstrate the coding scheme for arbitrary quantum channels with qubit inputs, and we show that quantum data can be reliably decoded by O(N) rounds of coherent quantum successive cancellation, followed by N controlled-NOT gates (where N is the number of channel uses). We also find that the entanglement consumption rate of the code vanishes for degradable quantum channels. Finally, we extend the coding scheme to channels with multiple qubit inputs. This gives a near-explicit method for realizing one of the most striking phenomena in quantum information theory: the superactivation effect, whereby two quantum channels which individually have zero quantum capacity can have a non-zero quantum capacity when used together." @default.
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- W3098032907 date "2012-07-01" @default.
- W3098032907 modified "2023-09-25" @default.
- W3098032907 title "Quantum polar codes for arbitrary channels" @default.
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- W3098032907 doi "https://doi.org/10.1109/isit.2012.6284203" @default.
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