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Abstract:

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.

Registro:

Documento: Artículo
Título:New counterterms induced by trans-Planckian physics in semiclassical gravity
Autor:Nacir, D.L.; Mazzitelli, F.D.
Filiación:Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas Y Naturales, Pabellón I, 1428 Buenos Aires, Argentina
Año:2008
Volumen:78
Número:4
DOI: http://dx.doi.org/10.1103/PhysRevD.78.044001
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v78_n4_p_Nacir

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Citas:

---------- APA ----------
Nacir, D.L. & Mazzitelli, F.D. (2008) . New counterterms induced by trans-Planckian physics in semiclassical gravity. Physical Review D - Particles, Fields, Gravitation and Cosmology, 78(4).
http://dx.doi.org/10.1103/PhysRevD.78.044001
---------- CHICAGO ----------
Nacir, D.L., Mazzitelli, F.D. "New counterterms induced by trans-Planckian physics in semiclassical gravity" . Physical Review D - Particles, Fields, Gravitation and Cosmology 78, no. 4 (2008).
http://dx.doi.org/10.1103/PhysRevD.78.044001
---------- MLA ----------
Nacir, D.L., Mazzitelli, F.D. "New counterterms induced by trans-Planckian physics in semiclassical gravity" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 78, no. 4, 2008.
http://dx.doi.org/10.1103/PhysRevD.78.044001
---------- VANCOUVER ----------
Nacir, D.L., Mazzitelli, F.D. New counterterms induced by trans-Planckian physics in semiclassical gravity. Phys Rev D Part Fields Gravit Cosmol. 2008;78(4).
http://dx.doi.org/10.1103/PhysRevD.78.044001