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.
- Received 6 August 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.027902
©2004 American Physical Society