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Correcting quantum channels by measuring the environment

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arxiv quant-ph/0409026 v1 pith:SLBOWBE6 submitted 2004-09-03 quant-ph

classification quant-ph
keywords capacitycorrectedchannelschannelenvironmentmeasuringquantumqubit
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The corrected capacity of a quantum channel is defined as the best one-shot capacity that can be obtained by measuring the environment and using the result to correct the output of the channel. It is shown that (i) all qubit channels have corrected capacity log 2, (ii) a product of N qubit channels has corrected capacity N log 2, and (iii) all channels have corrected capacity at least log 2. The question is posed of finding the channel with smallest corrected capacity in any dimension d.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantum Relay Channels

    quant-ph 2024-11 conditional novelty 7.0 of 10

    First achievable-rate bounds for fully quantum relay channels, including an exact capacity formula for Hadamard relay channels.

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