Quantum entanglement and classical communication through a depolarising channel
D. Bruss, L. Faoro, C. Macchiavello, M. Palma
Abstract
We analyse the role of entanglement for transmission of classical information through a memoryless depolarising channel. Using the isotropic character of this channel we prove analytically that the mutual information cannot be increased by encoding classical bits into entangled states of two qubits.
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