Preservation of loss in linear-optical processing

Dominic W. Berry, A. I. Lvovsky

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We propose a measure of quantum efficiency of a multimode state of light that quantifies the amount of optical loss this state has experienced, and prove that this efficiency cannot increase in any linear-optical processing with destructive conditional measurements. Any loss that has affected a state can neither be removed nor redistributed so as to further increase the efficiency in higher-efficiency modes at the expense of lower-efficiency modes. This result eliminates the possibility of catalytically improving photon sources.

LanguageEnglish
Article number042304
Pages1-7
Number of pages7
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number4
DOIs
Publication statusPublished - 4 Oct 2011
Externally publishedYes

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Preservation of loss in linear-optical processing. / Berry, Dominic W.; Lvovsky, A. I.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 84, No. 4, 042304, 04.10.2011, p. 1-7.

Research output: Contribution to journalArticleResearchpeer-review

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