Entanglement enhanced information transmission over a quantum channel with correlated noise
Chiara Macchiavello, G. Massimo Palma
Abstract
We show that entanglement is a useful resource to enhance the mutual information of the depolarizing channel when the noise on consecutive uses of the channel has some partial correlations. We obtain a threshold in the degree of memory, depending on the shrinking factor of the channel, above which a higher amount of classical information is transmitted with entangled signals.
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