The Capacity of the Quantum Multiple Access Channel

Details The Capacity of the Quantum Multiple Access Channel The Capacity of the Quantum Multiple Access Channel

1998-07-06

arxiv.org/abs/quant-ph/9807019v3

IEEE Trans.Info.Theor. 47 (2001) 3059-3065

Physics

Quantum Physics

7 pages, requires IEEEtran2e.cls

Scientific paper

We define classical-quantum multiway channels for transmission of classical information, after recent work by Allahverdyan and Saakian. Bounds on the capacity region are derived in a uniform way, which are analogous to the classically known ones, simply replacing Shannon entropy with von Neumann entropy. For the single receiver case (multiple access channel) the exact capacity region is determined. These results are applied to the case of noisy channels, with arbitrary input signal states. A second issue of this work is the presentation of a calculus of quantum information quantities, based on the algebraic formulation of quantum theory.

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