Minimum output entropy of bosonic channels: A conjecture

Vittorio Giovannetti, Saikat Guha, Seth Lloyd, Lorenzo Maccone, Jeffrey H. Shapiro

Research output: Contribution to journalReview articlepeer-review

103 Scopus citations


The von Neumann entropy was analyzed at the output of a bosonic channel with thermal noise. Two bosonic channels, including the thermal noise channel and the classical noise channel, both belonging to the class of Gaussian completely positive (CP) maps were considered. The coherent-state inputs were conjectured in order to minimize the output entropy. It was shown that the output states resulting from coherent state inputs maximized the output states from other inputs.

Original languageEnglish (US)
Article number032315
Pages (from-to)032315-1-032315-14
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - Sep 2004
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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