Post-processing with linear optics for improving the quality of single-photon sources

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dc.creatorBerry, Dominic W.
dc.creatorScheel, Stefan
dc.creatorMyers, Casey R.
dc.creatorSanders, Barry C.
dc.creatorKnight, Peter L.
dc.creatorLaflamme, Raymond
dc.date2004-02-03
dc.date.accessioned2026-07-07T06:08:55Z
dc.date.available2026-07-07T06:08:55Z
dc.descriptionTriggered single-photon sources produce the vacuum state with non-negligible probability, but produce a much smaller multiphoton component. It is therefore reasonable to approximate the output of these photon sources as a mixture of the vacuum and single-photon states. We show that it is impossible to increase the probability for a single photon using linear optics and photodetection on fewer than four modes. This impossibility is due to the incoherence of the inputs; if the inputs were pure-state superpositions, it would be possible to obtain a perfect single-photon output. In the more general case, a chain of beam splitters can be used to increase the probability for a single photon, but at the expense of adding an additional multiphoton component. This improvement is robust against detector inefficiencies, but is degraded by dark counts or multiphoton components in the input.
dc.description17 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0402018
dc.identifierhttp://arxiv.org/abs/quant-ph/0402018
dc.identifierNew J. Phys. 6, 93 (2004)
dc.identifierdoi:10.1088/1367-2630/6/1/093
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91798
dc.subjectQuantum Physics
dc.titlePost-processing with linear optics for improving the quality of single-photon sources
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