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Photonic Quantum Computing
Preservation of loss in linear-optical processing
arXiv
Authors: Dominic W. Berry, A. I. Lvovsky
Year
2010
Paper ID
10636
Status
Preprint
Abstract Read
~2 min
Abstract Words
78
Citations
N/A
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.
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- This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
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- 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...
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