Demonstrating an absolute quantum advantage in direct absorption measurement

Abstract Engineering apparatus that harness quantum theory promises to offer practical advantages over current technology. A fundamentally more powerful prospect is that such quantum technologies could out-perform any future iteration of their classical counterparts, no matter how well the attribute...

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Autores principales:	Paul-Antoine Moreau, Javier Sabines-Chesterking, Rebecca Whittaker, Siddarth K. Joshi, Patrick M. Birchall, Alex McMillan, John G. Rarity, Jonathan C. F. Matthews
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5da4f4bfdb9f4368973e4fc7cedc0298
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spelling	oai:doaj.org-article:5da4f4bfdb9f4368973e4fc7cedc02982021-12-02T16:06:15ZDemonstrating an absolute quantum advantage in direct absorption measurement10.1038/s41598-017-06545-w2045-2322https://doaj.org/article/5da4f4bfdb9f4368973e4fc7cedc02982017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06545-whttps://doaj.org/toc/2045-2322Abstract Engineering apparatus that harness quantum theory promises to offer practical advantages over current technology. A fundamentally more powerful prospect is that such quantum technologies could out-perform any future iteration of their classical counterparts, no matter how well the attributes of those classical strategies can be improved. Here, for optical direct absorption measurement, we experimentally demonstrate such an instance of an absolute advantage per photon probe that is exposed to the absorbative sample. We use correlated intensity measurements of spontaneous parametric downconversion using a commercially available air-cooled CCD, a new estimator for data analysis and a high heralding efficiency photon-pair source. We show this enables improvement in the precision of measurement, per photon probe, beyond what is achievable with an ideal coherent state (a perfect laser) detected with 100% efficient and noiseless detection. We see this absolute improvement for up to 50% absorption, with a maximum observed factor of improvement of 1.46. This equates to around 32% reduction in the total number of photons traversing an optical sample, compared to any future direct optical absorption measurement using classical light.Paul-Antoine MoreauJavier Sabines-ChesterkingRebecca WhittakerSiddarth K. JoshiPatrick M. BirchallAlex McMillanJohn G. RarityJonathan C. F. MatthewsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paul-Antoine Moreau Javier Sabines-Chesterking Rebecca Whittaker Siddarth K. Joshi Patrick M. Birchall Alex McMillan John G. Rarity Jonathan C. F. Matthews Demonstrating an absolute quantum advantage in direct absorption measurement
description	Abstract Engineering apparatus that harness quantum theory promises to offer practical advantages over current technology. A fundamentally more powerful prospect is that such quantum technologies could out-perform any future iteration of their classical counterparts, no matter how well the attributes of those classical strategies can be improved. Here, for optical direct absorption measurement, we experimentally demonstrate such an instance of an absolute advantage per photon probe that is exposed to the absorbative sample. We use correlated intensity measurements of spontaneous parametric downconversion using a commercially available air-cooled CCD, a new estimator for data analysis and a high heralding efficiency photon-pair source. We show this enables improvement in the precision of measurement, per photon probe, beyond what is achievable with an ideal coherent state (a perfect laser) detected with 100% efficient and noiseless detection. We see this absolute improvement for up to 50% absorption, with a maximum observed factor of improvement of 1.46. This equates to around 32% reduction in the total number of photons traversing an optical sample, compared to any future direct optical absorption measurement using classical light.
format	article
author	Paul-Antoine Moreau Javier Sabines-Chesterking Rebecca Whittaker Siddarth K. Joshi Patrick M. Birchall Alex McMillan John G. Rarity Jonathan C. F. Matthews
author_facet	Paul-Antoine Moreau Javier Sabines-Chesterking Rebecca Whittaker Siddarth K. Joshi Patrick M. Birchall Alex McMillan John G. Rarity Jonathan C. F. Matthews
author_sort	Paul-Antoine Moreau
title	Demonstrating an absolute quantum advantage in direct absorption measurement
title_short	Demonstrating an absolute quantum advantage in direct absorption measurement
title_full	Demonstrating an absolute quantum advantage in direct absorption measurement
title_fullStr	Demonstrating an absolute quantum advantage in direct absorption measurement
title_full_unstemmed	Demonstrating an absolute quantum advantage in direct absorption measurement
title_sort	demonstrating an absolute quantum advantage in direct absorption measurement
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5da4f4bfdb9f4368973e4fc7cedc0298
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_version_	1718385025379991552

Demonstrating an absolute quantum advantage in direct absorption measurement

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