Amplification of quantum states and noiseless photon amplifiers

Horace P. Yuen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

223 Scopus citations


It is shown that in principle a device exists which would duplicate a quantum system within a class of quantum states if and only if those quantum states are mutually orthogonal. The possible existence of a related noiseless photon amplifier is also established.

Original languageEnglish (US)
Pages (from-to)405-407
Number of pages3
JournalPhysics Letters A
Issue number8
StatePublished - Jan 13 1986

ASJC Scopus subject areas

  • General Physics and Astronomy


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