منابع مشابه
Perturbations of Self-Accelerated Universe
We discuss small perturbations on the self-accelerated solution of the DGP model, and argue that claims of instability of the solution that are based on linearized calculations are unwarranted because of the following: (1) Small perturbations of an empty self-accelerated background can be quantized consistently without yielding ghosts. (2) Conformal sources, such as radiation, do not give rise ...
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We establish a new model, which takes into account a dynamic (inertial) self-interaction of gravitating systems. The model is formulated by introduction of a new function depending on the square of the covariant derivative of the velocity four-vector of the system as a whole into the Lagrangian. This term is meant for description of both self-action of the system irregularly moving in the gravi...
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In a recent paper, a cosmological model based on El Naschie E infinity cantorian spacetime was presented [1]. In that work it was claimed that the present accelerated expansion of the Universe can be obtained as the effect of a scaling law on newtonian cosmology with a certain time dependent gravitational constant (G). In the present work we show that it may be problematic to explain the presen...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2005
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x05024778