New counterterms induced by trans-Planckian physics in semiclassical gravity

We consider free and self-interacting quantum scalar fields satisfying modified dispersion relations in the framework of Einstein-Aether theory. Using adiabatic regularization, we study the renormalization of the equation for the mean value of the field in the self-interacting case, and the renormal...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: López Nacir, Diana Laura, Mazzitelli, Francisco Diego
Publicado: 2008
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v78_n4_p_Nacir
http://hdl.handle.net/20.500.12110/paper_15507998_v78_n4_p_Nacir
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15507998_v78_n4_p_Nacir
record_format dspace
spelling paper:paper_15507998_v78_n4_p_Nacir2023-06-08T16:22:05Z New counterterms induced by trans-Planckian physics in semiclassical gravity López Nacir, Diana Laura Mazzitelli, Francisco Diego We consider free and self-interacting quantum scalar fields satisfying modified dispersion relations in the framework of Einstein-Aether theory. Using adiabatic regularization, we study the renormalization of the equation for the mean value of the field in the self-interacting case, and the renormalization of the semiclassical Einstein-Aether equations for free fields. In both cases we consider Bianchi type I background spacetimes. Contrary to what happens for free fields in flat Robertson-Walker spacetimes, the self-interaction and/or the anisotropy produce nonpurely geometric terms in the adiabatic expansion, i.e. terms that involve both the metric gμν and the aether field uμ. We argue that, in a general spacetime, the renormalization of the theory would involve new counterterms constructed with gμν and uμ, generating a fine-tuning problem for the Einstein-Aether theory. © 2008 The American Physical Society. Fil:Nacir, D.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mazzitelli, F.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v78_n4_p_Nacir http://hdl.handle.net/20.500.12110/paper_15507998_v78_n4_p_Nacir
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We consider free and self-interacting quantum scalar fields satisfying modified dispersion relations in the framework of Einstein-Aether theory. Using adiabatic regularization, we study the renormalization of the equation for the mean value of the field in the self-interacting case, and the renormalization of the semiclassical Einstein-Aether equations for free fields. In both cases we consider Bianchi type I background spacetimes. Contrary to what happens for free fields in flat Robertson-Walker spacetimes, the self-interaction and/or the anisotropy produce nonpurely geometric terms in the adiabatic expansion, i.e. terms that involve both the metric gμν and the aether field uμ. We argue that, in a general spacetime, the renormalization of the theory would involve new counterterms constructed with gμν and uμ, generating a fine-tuning problem for the Einstein-Aether theory. © 2008 The American Physical Society.
author López Nacir, Diana Laura
Mazzitelli, Francisco Diego
spellingShingle López Nacir, Diana Laura
Mazzitelli, Francisco Diego
New counterterms induced by trans-Planckian physics in semiclassical gravity
author_facet López Nacir, Diana Laura
Mazzitelli, Francisco Diego
author_sort López Nacir, Diana Laura
title New counterterms induced by trans-Planckian physics in semiclassical gravity
title_short New counterterms induced by trans-Planckian physics in semiclassical gravity
title_full New counterterms induced by trans-Planckian physics in semiclassical gravity
title_fullStr New counterterms induced by trans-Planckian physics in semiclassical gravity
title_full_unstemmed New counterterms induced by trans-Planckian physics in semiclassical gravity
title_sort new counterterms induced by trans-planckian physics in semiclassical gravity
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v78_n4_p_Nacir
http://hdl.handle.net/20.500.12110/paper_15507998_v78_n4_p_Nacir
work_keys_str_mv AT lopeznacirdianalaura newcountertermsinducedbytransplanckianphysicsinsemiclassicalgravity
AT mazzitellifranciscodiego newcountertermsinducedbytransplanckianphysicsinsemiclassicalgravity
_version_ 1768541956491706368

Ejemplares similares