Preservation of loss in linear-optical processing

Dominic W. Berry; A. I. Lvovsky

doi:10.1103/PhysRevA.84.042304

Preservation of loss in linear-optical processing

Dominic W. Berry^*, A. I. Lvovsky

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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.

Original language	English
Article number	042304
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	84
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.84.042304
Publication status	Published - 4 Oct 2011
Externally published	Yes

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10.1103/PhysRevA.84.042304

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AB - 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.

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Preservation of loss in linear-optical processing

Abstract

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