Transition behavior in the capacity of correlated - noisy channels in arbitrary dimensions
نویسندگان
چکیده
We construct a class of quantum channels in arbitrary dimensions for which entanglement enhances the mutual information. The channels have correlated noise and when the level of correlation passes a critical value we see a sharp transition in the optimal input states, states which maximize the mutual information or minimize the output entropy, from separable states to maximally entangled states. This adds to the already accumulated evidence that the conjecture of additivity of classical capacity of quantum channels does not hold for correlated channels.
منابع مشابه
6 Transition behavior in the capacity of correlated - noisy channels in arbitrary dimensions
We construct a class of quantum channels in arbitrary dimensions for which entanglement improves the performance of the channel. The channels have correlated noise and when the level of correlation passes a critical value we see a sharp transition in the optimal input states (states which minimize the output entropy) from separable to maximally entangled states. We show that for a subclass of c...
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