Ultimate information carrying limit of quantum systems

Horace P. Yuen*, Masanao Ozawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

173 Scopus citations


The possible amount of information transfer between any source and any user via a quantum system is bounded through the quantum entropy function. In contrast to the classical case, this shows that infinite information transfer implies infinite entropy. The entropy bound is also applied to obtain the ultimate quantum information transmission capacity of the free electromagnetic field under a power and a bandwidth constraint.

Original languageEnglish (US)
Pages (from-to)363-366
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - 1993

ASJC Scopus subject areas

  • General Physics and Astronomy


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