TY - JOUR
T1 - Bell inequality and its application to cosmology
AU - Kanno, Sugumi
AU - Soda, Jiro
N1 - Funding Information:
Acknowledgments: This work was supported by IKERBASQUE, the Basque Foundation for Science and the Basque Government (IT-979-16), and Spanish Ministry MINECO (FPA2015-64041-C2-1P).
Publisher Copyright:
© 2017 by the authors.
PY - 2017/12/12
Y1 - 2017/12/12
N2 - 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.
AB - 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.
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U2 - 10.3390/galaxies5040099
DO - 10.3390/galaxies5040099
M3 - Article
AN - SCOPUS:85037744170
SN - 2075-4434
VL - 5
JO - Galaxies
JF - Galaxies
IS - 4
M1 - 99
ER -