Quantum entanglement and classical communication through a depolarising channel

Details Quantum entanglement and classical communication through a depolarising channel Quantum entanglement and classical communication through a depolarising channel

1999-03-09

arxiv.org/abs/quant-ph/9903033v2

J.Mod.Opt. 47 (2000) 325

Physics

Quantum Physics

6 pages, 2 figures; contribution to special issue of JMO on the physics of quantum information; 2nd version: slight modificati

Scientific paper

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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