New counterterms induced by trans-Planckian physics in semiclassical gravity

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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...

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Autor principal: Nacir, D.L
Otros Autores: Mazzitelli, F.D
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2008
Acceso en línea:Registro en Scopus
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100 1 |a Nacir, D.L. 
245 1 0 |a New counterterms induced by trans-Planckian physics in semiclassical gravity 
260 |c 2008 
270 1 0 |m Nacir, D. L.; Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas Y Naturales, Pabellón I, 1428 Buenos Aires, Argentina; email: dnacir@df.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a 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.  |l eng 
593 |a Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas Y Naturales, Pabellón I, 1428 Buenos Aires, Argentina 
700 1 |a Mazzitelli, F.D. 
773 0 |d 2008  |g v. 78  |k n. 4  |p Phys Rev D Part Fields Gravit Cosmol  |x 15507998  |t Physical Review D - Particles, Fields, Gravitation and Cosmology 
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