Gaussian classical-quantum channels: Gain from entanglement-assistance

Gaussian classical-quantum channels: Gain from entanglement-assistance In the present paper we introduce and study Bosonic Gaussian classical-quantum (c-q) channels; embedding of the classical input in quantum input is always possible, and therefore the classical entanglement-assisted capacity C ea under an appropriate input constraint is well defined. We prove the general property of entropy increase for a weak complementary channel, which implies the equality C = C ea (where C is the unassisted capacity) for a certain class of c-q Gaussian channels under an appropriate energy-type constraint. On the other hand, we show by an explicit example that the inequality C < C ea is not unusual for constrained c-q Gaussian channel. Problems of Information Transmission Springer Journals

Gaussian classical-quantum channels: Gain from entanglement-assistance

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Pleiades Publishing
Copyright © 2014 by Pleiades Publishing, Inc.
Engineering; Communications Engineering, Networks; Electrical Engineering; Information Storage and Retrieval; Systems Theory, Control
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