Classical Information Capacity of the Bosonic Broadcast Channel

Details Classical Information Capacity of the Bosonic Broadcast Channel Classical Information Capacity of the Bosonic Broadcast Channel

2007-04-15

arxiv.org/abs/0704.1901v2

Physics

Quantum Physics

5 pages, 4 figures, to appear in Proceedings of ISIT 2007

Scientific paper

We show that when coherent-state encoding is employed in conjunction with coherent detection, the Bosonic broadcast channel is equivalent to a classical degraded Gaussian broadcast channel whose capacity region is dual to that of the classical Gaussian multiple-access channel. We further show that if a minimum output-entropy conjecture holds true, then the ultimate classical information capacity of the Bosonic broadcast channel can be achieved by a coherent-state encoding. We provide some evidence in support of the conjecture.

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