Thick brane solutions
نویسندگان
چکیده
منابع مشابه
Instability of thick brane worlds
We examined 5d thick brane worlds constructed by a real scalar field. The solutions are obtained in terms of a simple form of smooth warp factor. For the case of dS brane, we found a disease of the solutions. For example, it is impossible to construct thick-brane worlds with our simple smoothing. This result is independent of supersymmetry or other symmetries. [email protected] yahiro@s...
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We study a non-Riemannian modification of 5-dimensional Kaluza-Klein theory. In our proposal the Riemannian structure of the five-dimensional manifold is replaced by a Weylintegrable one. In this context a 4-dimensional Poincarè invariant solution is studied. A spacetime structure with two thick (smooth) branes separated in the extra dimension arises. The massless graviton is located in one of ...
متن کاملThick Brane Worlds and Their Stability
Three types of thick branes, i.e., Poincaré, de Sitter and Anti-de Sitter brane are considered. They are realized as the non-singular solutions of the Einstein equations with the non-trivial dilatons and the potentials. The scalar perturbations of these systems are also investigated. We find that the effective potentials of the master equations of the scalar perturbations are positive definite ...
متن کاملCosmological Equations for a Thick Brane
Generalized Friedmann equations governing the cosmological evolution inside a thick brane embedded in a five-dimensional Anti-de Sitter spacetime are derived. These equations are written in terms of four-dimensional effective brane quantities obtained by integrating, along the fifth dimension, over the brane thickness. In the case of a Randall-Sundrum type cosmology, different limits of these e...
متن کاملThick Brane World Model from Perfect Fluid
A (1 + d)-dimensional thick ”brane world” model with varying Λ-term is considered. The model is generalized to the case of a chain of Ricci-flat internal spaces when the matter source is an anisotropic perfect fluid. The ”horizontal” part of potential is obtained in the Newtonian approximation. In the multitemporal case (with a Λ-term) a set of equations for potentials is presented. [email protected]...
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ژورنال
عنوان ژورنال: Reports on Progress in Physics
سال: 2010
ISSN: 0034-4885,1361-6633
DOI: 10.1088/0034-4885/73/6/066901