Quantum entanglement and classical communication through a depolarising channel
Quantum Physics
2015-06-26 v2
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.
Cite
@article{arxiv.quant-ph/9903033,
title = {Quantum entanglement and classical communication through a depolarising channel},
author = {D. Bruss and L. Faoro and C. Macchiavello and M. Palma},
journal= {arXiv preprint arXiv:quant-ph/9903033},
year = {2015}
}
Comments
6 pages, 2 figures; contribution to special issue of JMO on the physics of quantum information; 2nd version: slight modifications and improved presentation