A physical characterization of the adiabatic vacuum in Robertson-Walker universe
As the red shift shows no sign of oscillatory behavior in an expanding universe we postulate that the energy ωk of a scalar field does not oscillate in such a universe. In the massive case, expanding the differential equation for ωk in mass powers, we find that the nonoscillatory solution coincides...
Guardado en:
Autores principales: | , |
---|---|
Publicado: |
1986
|
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v18_n2_p193_Castagnino http://hdl.handle.net/20.500.12110/paper_00017701_v18_n2_p193_Castagnino |
Aporte de: |
id |
paper:paper_00017701_v18_n2_p193_Castagnino |
---|---|
record_format |
dspace |
spelling |
paper:paper_00017701_v18_n2_p193_Castagnino2023-06-08T14:21:28Z A physical characterization of the adiabatic vacuum in Robertson-Walker universe Castagnino, Mario Alberto G. J. Chimento, Luis Pascual As the red shift shows no sign of oscillatory behavior in an expanding universe we postulate that the energy ωk of a scalar field does not oscillate in such a universe. In the massive case, expanding the differential equation for ωk in mass powers, we find that the nonoscillatory solution coincides with the adiabatic solution up to the m6 order. We also demonstrate that this solution is unique for all the evolution of the universe with cosmological interest. Using the nonoscillatory solution as the one that defines the good vacuum state, we compute the particle and energy creation for a simple model of expanding universe. Both quantities turn out to be finite. © 1986 Plenum Publishing Corporation. Fil:Castagnino, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Chimento, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1986 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v18_n2_p193_Castagnino http://hdl.handle.net/20.500.12110/paper_00017701_v18_n2_p193_Castagnino |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
description |
As the red shift shows no sign of oscillatory behavior in an expanding universe we postulate that the energy ωk of a scalar field does not oscillate in such a universe. In the massive case, expanding the differential equation for ωk in mass powers, we find that the nonoscillatory solution coincides with the adiabatic solution up to the m6 order. We also demonstrate that this solution is unique for all the evolution of the universe with cosmological interest. Using the nonoscillatory solution as the one that defines the good vacuum state, we compute the particle and energy creation for a simple model of expanding universe. Both quantities turn out to be finite. © 1986 Plenum Publishing Corporation. |
author |
Castagnino, Mario Alberto G. J. Chimento, Luis Pascual |
spellingShingle |
Castagnino, Mario Alberto G. J. Chimento, Luis Pascual A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
author_facet |
Castagnino, Mario Alberto G. J. Chimento, Luis Pascual |
author_sort |
Castagnino, Mario Alberto G. J. |
title |
A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
title_short |
A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
title_full |
A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
title_fullStr |
A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
title_full_unstemmed |
A physical characterization of the adiabatic vacuum in Robertson-Walker universe |
title_sort |
physical characterization of the adiabatic vacuum in robertson-walker universe |
publishDate |
1986 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v18_n2_p193_Castagnino http://hdl.handle.net/20.500.12110/paper_00017701_v18_n2_p193_Castagnino |
work_keys_str_mv |
AT castagninomarioalbertogj aphysicalcharacterizationoftheadiabaticvacuuminrobertsonwalkeruniverse AT chimentoluispascual aphysicalcharacterizationoftheadiabaticvacuuminrobertsonwalkeruniverse AT castagninomarioalbertogj physicalcharacterizationoftheadiabaticvacuuminrobertsonwalkeruniverse AT chimentoluispascual physicalcharacterizationoftheadiabaticvacuuminrobertsonwalkeruniverse |
_version_ |
1768544250566279168 |