Investigating the Effects of the Interaction Intensity in a Weak Measurement

Abstract Measurements are crucial in quantum mechanics, for fundamental research as well as for applicative fields like quantum metrology, quantum-enhanced measurements and other quantum technologies. In the recent years, weak-interaction-based protocols like Weak Measurements and Protective Measure...

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Autores principales:	Fabrizio Piacentini, Alessio Avella, Marco Gramegna, Rudi Lussana, Federica Villa, Alberto Tosi, Giorgio Brida, Ivo Pietro Degiovanni, Marco Genovese
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8941dd0c07154975a15fd6255584a4f9
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spelling	oai:doaj.org-article:8941dd0c07154975a15fd6255584a4f92021-12-02T15:09:05ZInvestigating the Effects of the Interaction Intensity in a Weak Measurement10.1038/s41598-018-25156-72045-2322https://doaj.org/article/8941dd0c07154975a15fd6255584a4f92018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25156-7https://doaj.org/toc/2045-2322Abstract Measurements are crucial in quantum mechanics, for fundamental research as well as for applicative fields like quantum metrology, quantum-enhanced measurements and other quantum technologies. In the recent years, weak-interaction-based protocols like Weak Measurements and Protective Measurements have been experimentally realized, showing peculiar features leading to surprising advantages in several different applications. In this work we analyze the validity range for such measurement protocols, that is, how the interaction strength affects the weak value extraction, by measuring different polarization weak values on heralded single photons. We show that, even in the weak interaction regime, the coupling intensity limits the range of weak values achievable, setting a threshold on the signal amplification effect exploited in many weak measurement based experiments.Fabrizio PiacentiniAlessio AvellaMarco GramegnaRudi LussanaFederica VillaAlberto TosiGiorgio BridaIvo Pietro DegiovanniMarco GenoveseNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fabrizio Piacentini Alessio Avella Marco Gramegna Rudi Lussana Federica Villa Alberto Tosi Giorgio Brida Ivo Pietro Degiovanni Marco Genovese Investigating the Effects of the Interaction Intensity in a Weak Measurement
description	Abstract Measurements are crucial in quantum mechanics, for fundamental research as well as for applicative fields like quantum metrology, quantum-enhanced measurements and other quantum technologies. In the recent years, weak-interaction-based protocols like Weak Measurements and Protective Measurements have been experimentally realized, showing peculiar features leading to surprising advantages in several different applications. In this work we analyze the validity range for such measurement protocols, that is, how the interaction strength affects the weak value extraction, by measuring different polarization weak values on heralded single photons. We show that, even in the weak interaction regime, the coupling intensity limits the range of weak values achievable, setting a threshold on the signal amplification effect exploited in many weak measurement based experiments.
format	article
author	Fabrizio Piacentini Alessio Avella Marco Gramegna Rudi Lussana Federica Villa Alberto Tosi Giorgio Brida Ivo Pietro Degiovanni Marco Genovese
author_facet	Fabrizio Piacentini Alessio Avella Marco Gramegna Rudi Lussana Federica Villa Alberto Tosi Giorgio Brida Ivo Pietro Degiovanni Marco Genovese
author_sort	Fabrizio Piacentini
title	Investigating the Effects of the Interaction Intensity in a Weak Measurement
title_short	Investigating the Effects of the Interaction Intensity in a Weak Measurement
title_full	Investigating the Effects of the Interaction Intensity in a Weak Measurement
title_fullStr	Investigating the Effects of the Interaction Intensity in a Weak Measurement
title_full_unstemmed	Investigating the Effects of the Interaction Intensity in a Weak Measurement
title_sort	investigating the effects of the interaction intensity in a weak measurement
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/8941dd0c07154975a15fd6255584a4f9
work_keys_str_mv	AT fabriziopiacentini investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT alessioavella investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT marcogramegna investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT rudilussana investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT federicavilla investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT albertotosi investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT giorgiobrida investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT ivopietrodegiovanni investigatingtheeffectsoftheinteractionintensityinaweakmeasurement AT marcogenovese investigatingtheeffectsoftheinteractionintensityinaweakmeasurement
_version_	1718387951654666240

Investigating the Effects of the Interaction Intensity in a Weak Measurement

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