D. Bruss, L. Faoro, C. Macchiavello, M. Palma
Published 1999-03-09, updated 1999-06-02Version 2
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.
Comments: 6 pages, 2 figures; contribution to special issue of JMO on the physics of quantum information; 2nd version: slight modifications and improved presentation
Journal: J.Mod.Opt. 47 (2000) 325
Teleportation of an arbitrary mixture of diagonal states of multiqubits via classical correlation and classical communication
Simultaneous quantum and classical communication using continuous variable
Quantum Alice and Silent Bob: Qubit-based Quantum Key Recycling with almost no classical communication
