Minimum output entropy of bosonic channels: A conjecture
- 21 September 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 70 (3) , 032315
- https://doi.org/10.1103/physreva.70.032315
Abstract
The von Neumann entropy at the output of a bosonic channel with thermal noise is analyzed. Coherent-state inputs are conjectured to minimize this output entropy. Physical and mathematical evidence in support of the conjecture is provided. A stronger conjecture—that output states resulting from coherent-state inputs majorize the output states from other inputs—is also discussed.Keywords
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