Communication Theory of Quantum Systems.
MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
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The primary concern in this research is with communication theory problems incorporating quantum effects for optical-frequency applications. Under suitable conditions, a unique quantum channel model corresponding to a given calssical space-time varying linear random channel is established. A procedure is described by which a proper density operator representation applicable to any receiver configuration can be constructed directly from the channel output field. Some examples illustrating the application of the methods to the development of optical quantum channel representations are given. Optimizations of communication system performance under different criteria are considered. In particular, certain necessary and sufficient conditions on the optimal detector in M-ary quantum signal detection are derived. Some examples are presented. Parameter estimation and channel capacity are discussed briefly. Author
- Non-Radio Communications