Bell Inequality and Its Application to Cosmology

Bell Inequality and Its Application to Cosmology

One of the cornerstones of inflationary cosmology is that primordial density fluctuations have a quantum mechanical origin. However, most physicists consider that such quantum mechanical effects disappear in CMB data due to decoherence. In this conference report, we show that the violation of Bell i...

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Bibliographic Details
Main Authors: Sugumi Kanno, Jiro Soda
Format: Article
Language:English
Published: MDPI AG 2017-12-01
Series:Galaxies
Subjects:
quantum entanglement
inflation
Online Access:https://www.mdpi.com/2075-4434/5/4/99
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spelling doaj-92e1b12af47f451480f0d473ef81bfb32020-11-25T00:09:01ZengMDPI AGGalaxies2075-44342017-12-01549910.3390/galaxies5040099galaxies5040099Bell Inequality and Its Application to CosmologySugumi Kanno0Jiro Soda1Department of Theoretical Physics and History of Science, University of the Basque Country, 48080 Bilbao, SpainDepartment of Physics, Kobe University, Kobe 657-8501, JapanOne of the cornerstones of inflationary cosmology is that primordial density fluctuations have a quantum mechanical origin. However, most physicists consider that such quantum mechanical effects disappear in CMB data due to decoherence. In this conference report, we show that the violation of Bell inequalities in an initial state of our universe increases exponentially with the number of modes to measure in inflation. This indicates that some evidence that our universe has a quantum mechanical origin may survive in CMB data, even if quantum entanglement decays exponentially afterward due to decoherence.https://www.mdpi.com/2075-4434/5/4/99quantum entanglementinflation
collection DOAJ
language English
format Article
sources DOAJ
author Sugumi Kanno
Jiro Soda
spellingShingle Sugumi Kanno
Jiro Soda
Bell Inequality and Its Application to Cosmology
Galaxies
quantum entanglement
inflation
author_facet Sugumi Kanno
Jiro Soda
author_sort Sugumi Kanno
title Bell Inequality and Its Application to Cosmology
title_short Bell Inequality and Its Application to Cosmology
title_full Bell Inequality and Its Application to Cosmology
title_fullStr Bell Inequality and Its Application to Cosmology
title_full_unstemmed Bell Inequality and Its Application to Cosmology
title_sort bell inequality and its application to cosmology
publisher MDPI AG
series Galaxies
issn 2075-4434
publishDate 2017-12-01
description One of the cornerstones of inflationary cosmology is that primordial density fluctuations have a quantum mechanical origin. However, most physicists consider that such quantum mechanical effects disappear in CMB data due to decoherence. In this conference report, we show that the violation of Bell inequalities in an initial state of our universe increases exponentially with the number of modes to measure in inflation. This indicates that some evidence that our universe has a quantum mechanical origin may survive in CMB data, even if quantum entanglement decays exponentially afterward due to decoherence.
topic quantum entanglement
inflation
url https://www.mdpi.com/2075-4434/5/4/99
work_keys_str_mv AT sugumikanno bellinequalityanditsapplicationtocosmology
AT jirosoda bellinequalityanditsapplicationtocosmology
_version_ 1725413460840284160

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