Classical capacity of the lossy bosonic channel: the exact solution

Abstract

The classical capacity of the lossy bosonic channel is calculated exactly. It is shown that its Holevo information is not superadditive, and that a coherent-state encoding achieves capacity. The capacity of far-field, free-space optical communications is given as an example.

4 pages, 2 figures (revised version)

References in corpus (3)

• Capacities of Quantum Erasure Channels
• Entanglement assisted capacity of the broadband lossy channel
• Broadband channel capacities

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