Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method

Abstract Evanescent waves are ubiquitous at interfaces with optical, seismic or acoustic waves, and also with electron, neutron or atom beams. Newton was the first to suspect that both small time delays and spatial shifts exist during total internal reflection. However, these effects are so tiny tha...

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Autores principales:	Albert Le Floch, Olivier Emile, Guy Ropars, Govind P. Agrawal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/405dd1be195045a487aefd88398fa61b
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spelling	oai:doaj.org-article:405dd1be195045a487aefd88398fa61b2021-12-02T11:52:29ZDynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method10.1038/s41598-017-09502-92045-2322https://doaj.org/article/405dd1be195045a487aefd88398fa61b2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09502-9https://doaj.org/toc/2045-2322Abstract Evanescent waves are ubiquitous at interfaces with optical, seismic or acoustic waves, and also with electron, neutron or atom beams. Newton was the first to suspect that both small time delays and spatial shifts exist during total internal reflection. However, these effects are so tiny that the spatial shifts were only observed in 1947 in optics, whereas the time delay values predicted by the Wigner model in the 10−14 s range in optics had to await femtosecond lasers to be detected with difficulty. The spatial shifts have been isolated in many areas but the time delays, though fundamental, generally remain out of reach, particularly with particles. In textbooks usually both quantities are supposed to be simply linked. Here we report, using swivelling detectors, that the spatial and temporal measurements are intimately intermingled, especially in the so-called cyclical regime. Indeed, while the spatial shift does not depend on the type of detection, the measured time delay can be positive, negative or zero, but controllable. We also discuss how such intricate measurements of spatial and temporal effects allow crucial time penalties to be eliminated in guided soliton propagation, and should be used to unambiguously identify the Newton-Wigner time delays for particles.Albert Le FlochOlivier EmileGuy RoparsGovind P. AgrawalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Albert Le Floch Olivier Emile Guy Ropars Govind P. Agrawal Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
description	Abstract Evanescent waves are ubiquitous at interfaces with optical, seismic or acoustic waves, and also with electron, neutron or atom beams. Newton was the first to suspect that both small time delays and spatial shifts exist during total internal reflection. However, these effects are so tiny that the spatial shifts were only observed in 1947 in optics, whereas the time delay values predicted by the Wigner model in the 10−14 s range in optics had to await femtosecond lasers to be detected with difficulty. The spatial shifts have been isolated in many areas but the time delays, though fundamental, generally remain out of reach, particularly with particles. In textbooks usually both quantities are supposed to be simply linked. Here we report, using swivelling detectors, that the spatial and temporal measurements are intimately intermingled, especially in the so-called cyclical regime. Indeed, while the spatial shift does not depend on the type of detection, the measured time delay can be positive, negative or zero, but controllable. We also discuss how such intricate measurements of spatial and temporal effects allow crucial time penalties to be eliminated in guided soliton propagation, and should be used to unambiguously identify the Newton-Wigner time delays for particles.
format	article
author	Albert Le Floch Olivier Emile Guy Ropars Govind P. Agrawal
author_facet	Albert Le Floch Olivier Emile Guy Ropars Govind P. Agrawal
author_sort	Albert Le Floch
title	Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
title_short	Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
title_full	Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
title_fullStr	Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
title_full_unstemmed	Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method
title_sort	dynamics and detection of the newton-wigner time delays at interfaces using a swivelling method
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/405dd1be195045a487aefd88398fa61b
work_keys_str_mv	AT albertlefloch dynamicsanddetectionofthenewtonwignertimedelaysatinterfacesusingaswivellingmethod AT olivieremile dynamicsanddetectionofthenewtonwignertimedelaysatinterfacesusingaswivellingmethod AT guyropars dynamicsanddetectionofthenewtonwignertimedelaysatinterfacesusingaswivellingmethod AT govindpagrawal dynamicsanddetectionofthenewtonwignertimedelaysatinterfacesusingaswivellingmethod
_version_	1718395042696003584

Dynamics and detection of the Newton-Wigner time delays at interfaces using a swivelling method

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