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http://repositoriodigital.ipn.mx/handle/123456789/11422
Título : | RANDALL–SUNDRUM BRANE COSMOLOGY: MODIFICATION OF LATE-TIME COSMIC DYNAMICS BY EXOTIC MATTER |
Palabras clave : | Cosmology LATE-TIME COSMIC EXOTIC MATTER |
Fecha de publicación : | 16-ene-2013 |
Editorial : | IOP PUBLISHING CLASSICAL AND QUANTUM GRAVITY |
Descripción : | In this paper we show, through the study of concrete examples, that depending
on the cosmic dynamics of the energy density of matter degrees of freedom
living in the brane, Randall–Sundrum (RS) brane effects can be important not
only at short distances (UV regime), but also at large cosmological scales (IR
regime). Our first example relies on the study, by means of the dynamical
system tools, of a toy model based in a nonlinear electrodynamics (NLED)
Lagrangian. Then we show that other, less elaborated models, such as the
inclusion of a scalar phantom field, and of a tachyon phantom field—trapped
in the brane—produce similar results. The form of the RS correction seems to
convert what would have been future attractors in general relativity into saddle
points. The above ‘mixing of scales’ effect is distinctive only of theories that
modify the right-hand side (matter part) of the Friedmann equation, so that, for
instance, Dvali–Gabadadze–Porrati-brane models do not show this feature. Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada Legaria del IPN. Departamento de Fısica, Centro de Investigacion y de Estudios Avanzadas del IPN. Departamento de Fısica y Matematicas, Centro Universitario de Ciencias Exactas e Ingenierıas, Universidad de Guadalajara. Division de Ciencias e Ingenierıa de la Universidad de Guanajuato. |
URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11422 |
Otros identificadores : | 0022-3689 http://hdl.handle.net/123456789/937 |
Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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7Garcia_2011.pdf | 32.29 kB | Adobe PDF | Visualizar/Abrir |
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