Quantum Effects in Communications Systems

@article{Gordon1962QuantumEI,
  title={Quantum Effects in Communications Systems},
  author={James P. Gordon},
  journal={Proceedings of the IRE},
  year={1962},
  volume={50},
  pages={1898-1908}
}
  • J. Gordon
  • Published 1 September 1962
  • Physics
  • Proceedings of the IRE
The information capacity of various communications systems is considered. Quantum effects are taken fully into account. The entropy of an electromagnetic wave having the quantum statistical properties of white noise in a single transmission mode is found, and from it the information efficiency of various possible systems may be derived. The receiving systems considered include amplifiers, heterodyne and homodyne converters and quantum counters. In the limit of high signal or noise power… 

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