When Photons Are Lying about Where They Have Been

The history of photons in a nested Mach–Zehnder interferometer with an inserted Dove prism is analyzed. It is argued that the Dove prism does not change the past of the photon. Alonso and Jordan correctly point out that an experiment by Danan et al. demonstrating the past of the photon in a nested i...

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Detalles Bibliográficos
Autores principales: Vaidman, Lev, Tsutsui, Izumi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7513063/
https://www.ncbi.nlm.nih.gov/pubmed/33265627
http://dx.doi.org/10.3390/e20070538
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author Vaidman, Lev
Tsutsui, Izumi
author_facet Vaidman, Lev
Tsutsui, Izumi
author_sort Vaidman, Lev
collection PubMed
description The history of photons in a nested Mach–Zehnder interferometer with an inserted Dove prism is analyzed. It is argued that the Dove prism does not change the past of the photon. Alonso and Jordan correctly point out that an experiment by Danan et al. demonstrating the past of the photon in a nested interferometer will show different results when the Dove prism is inserted. The reason, however, is not that the past is changed, but that the experimental demonstration becomes incorrect. The explanation of a signal from the place in which the photon was (almost) not present is given. Bohmian trajectory of the photon is specified.
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spelling pubmed-75130632020-11-09 When Photons Are Lying about Where They Have Been Vaidman, Lev Tsutsui, Izumi Entropy (Basel) Article The history of photons in a nested Mach–Zehnder interferometer with an inserted Dove prism is analyzed. It is argued that the Dove prism does not change the past of the photon. Alonso and Jordan correctly point out that an experiment by Danan et al. demonstrating the past of the photon in a nested interferometer will show different results when the Dove prism is inserted. The reason, however, is not that the past is changed, but that the experimental demonstration becomes incorrect. The explanation of a signal from the place in which the photon was (almost) not present is given. Bohmian trajectory of the photon is specified. MDPI 2018-07-19 /pmc/articles/PMC7513063/ /pubmed/33265627 http://dx.doi.org/10.3390/e20070538 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vaidman, Lev
Tsutsui, Izumi
When Photons Are Lying about Where They Have Been
title When Photons Are Lying about Where They Have Been
title_full When Photons Are Lying about Where They Have Been
title_fullStr When Photons Are Lying about Where They Have Been
title_full_unstemmed When Photons Are Lying about Where They Have Been
title_short When Photons Are Lying about Where They Have Been
title_sort when photons are lying about where they have been
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7513063/
https://www.ncbi.nlm.nih.gov/pubmed/33265627
http://dx.doi.org/10.3390/e20070538
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