Observer dependence in quantum cosmology

The main thesis of this paper is that minisuperspace quantum cosmology reproduces the observer dependence of the vacuum found in quantum field theory in curved spacetime. We show that the vacua picked up by the Hartle-Hawking "no boundary" proposal in two different minisuperspaces sharing...

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Autores principales: Calzetta, Esteban Adolfo, Kandus, Alejandra
Publicado: 1993
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v48_n8_p3906_Calzetta
http://hdl.handle.net/20.500.12110/paper_05562821_v48_n8_p3906_Calzetta
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562821_v48_n8_p3906_Calzetta
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spelling paper:paper_05562821_v48_n8_p3906_Calzetta2023-06-08T15:42:14Z Observer dependence in quantum cosmology Calzetta, Esteban Adolfo Kandus, Alejandra The main thesis of this paper is that minisuperspace quantum cosmology reproduces the observer dependence of the vacuum found in quantum field theory in curved spacetime. We show that the vacua picked up by the Hartle-Hawking "no boundary" proposal in two different minisuperspaces sharing the same classical limit (k=0 and k=1 de Sitter minisuperspaces) are nonequivalent. A closer inspection suggests that the observer dependence is introduced through the choice of the Wick rotation. This hypothesis is supported by the analysis of the static de Sitter minisuperspace, where two different Euclidean sections are available, and where again two inequivalent vacua are obtained. These examples are not conclusive, but point to the possibility of a similar ambiguity even in full quantum cosmology. © 1993 The American Physical Society. Fil:Calzetta, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kandus, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1993 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v48_n8_p3906_Calzetta http://hdl.handle.net/20.500.12110/paper_05562821_v48_n8_p3906_Calzetta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The main thesis of this paper is that minisuperspace quantum cosmology reproduces the observer dependence of the vacuum found in quantum field theory in curved spacetime. We show that the vacua picked up by the Hartle-Hawking "no boundary" proposal in two different minisuperspaces sharing the same classical limit (k=0 and k=1 de Sitter minisuperspaces) are nonequivalent. A closer inspection suggests that the observer dependence is introduced through the choice of the Wick rotation. This hypothesis is supported by the analysis of the static de Sitter minisuperspace, where two different Euclidean sections are available, and where again two inequivalent vacua are obtained. These examples are not conclusive, but point to the possibility of a similar ambiguity even in full quantum cosmology. © 1993 The American Physical Society.
author Calzetta, Esteban Adolfo
Kandus, Alejandra
spellingShingle Calzetta, Esteban Adolfo
Kandus, Alejandra
Observer dependence in quantum cosmology
author_facet Calzetta, Esteban Adolfo
Kandus, Alejandra
author_sort Calzetta, Esteban Adolfo
title Observer dependence in quantum cosmology
title_short Observer dependence in quantum cosmology
title_full Observer dependence in quantum cosmology
title_fullStr Observer dependence in quantum cosmology
title_full_unstemmed Observer dependence in quantum cosmology
title_sort observer dependence in quantum cosmology
publishDate 1993
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v48_n8_p3906_Calzetta
http://hdl.handle.net/20.500.12110/paper_05562821_v48_n8_p3906_Calzetta
work_keys_str_mv AT calzettaestebanadolfo observerdependenceinquantumcosmology
AT kandusalejandra observerdependenceinquantumcosmology
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