منابع مشابه
Scalar field cosmology in three - dimensions .
Scalar field cosmology in three-dimensions. Abstract We study an analytical solution to the Einstein's equations in 2 + 1-dimensions. The space-time is dynamical and has a line symmetry. The matter content is a minimally coupled, massless, scalar field. Depending on the value of certain parameters, this solution represents three distinct space-times. The first one is flat space-time. Then, we h...
متن کاملScalar field collapse in three - dimensions
Scalar field collapse in three-dimensions. Abstract We study an analytical solution to the Einstein's equations in 2 + 1-dimensions, representing the collapse of a circularly symmetric, minimally coupled, massless, scalar field. Depending on the value of certain parameters , this solution exhibits all three, known, end states of a collapse situation: Minkowski space-time after a bouncing, naked...
متن کاملInteractions in Scalar Field Cosmology
We investigate spatially flat isotropic cosmological models which contain a scalar field with an exponential potential and a perfect fluid with a linear equation of state. We include an interaction term, through which the energy of the scalar field is transferred to the matter fields, consistent with a term that arises from scalar–tensor theory under a conformal transformation and field redefin...
متن کاملBouncing Cosmology in Three Dimensions
We consider a dynamical two-brane in a four dimensional black hole background with scalar hair. At high temperature this black hole goes through a phase transition by radiating away the scalar. The end phase is a topological adS-Schwarzschild black hole. We argue here that for a sufficiently low temperature, the brane motion in this geometry is non-singular. This results in a universe which pas...
متن کاملBulk scalar field in DGP braneworld cosmology
We investigated the effects of bulk scalar field in the braneworld cosmological scenario. The Friedmann equations and acceleration condition in presence of the bulk scalar field for a zero tension brane and cosmological constant are studied. In DGP model the effective Einstein equation on the brane is obtained with bulk scalar field. The rescaled bulk scalar field on the brane in the DGP model ...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2001
ISSN: 0103-9733
DOI: 10.1590/s0103-97332001000300017