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The capacity of the quantum multiple-access channel

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1 Author(s)
Winter, A. ; Dept. of Comput. Sci., Bristol Univ., UK

We define classical quantum multiway channels for transmission of classical information, after the previous work by Allahverdyan and Saakian (see Quantum Computing and Quantum Communications (Lecture Notes in Computer Science). Berlin, Germany: Springer-Verlag, vol.1509, 1999). Bounds on the capacity region are derived in a uniform way, which are analogous to the classically known ones, simply replacing Shannon (1961) entropy with von Neumann (1955) entropy. For the single receiver case (multiple-access channel) the elect 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

Published in:

Information Theory, IEEE Transactions on  (Volume:47 ,  Issue: 7 )

Date of Publication:

Nov 2001

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