29 research outputs found
Conformal Invariance and Wave-Particle Duality
We present a conformally invariant generalized form of the free particle
action by connecting the wave and particle aspects through gravity. Conformal
invariance breaking is introduced by choosing a particular configurat$ of
dynamical variables. This leads to the geometrization of the quantum aspects of
matter.Comment: 5 page
Scalar-tensor cosmology with R^{-1} curvature correction by Noether Symmetry
We discuss scalar-tensor cosmology with an extra correction by the
Noether Symmetry Approach. The existence of such a symmetry selects the forms
of the coupling , of the potential and allows to obtain
physically interesting exact cosmological solutions.Comment: 7 page
Bianchi Type I Cosmology in Generalized Saez-Ballester Theory via Noether Gauge Symmetry
In this paper, we investigate the generalized Saez-Ballester scalar-tensor
theory of gravity via Noether gauge symmetry (NGS) in the background of Bianchi
type I cosmological spacetime. We start with the Lagrangian of our model and
calculate its gauge symmetries and corresponding invariant quantities. We
obtain the potential function for the scalar field in the exponential form. For
all the symmetries obtained, we determine the gauge functions corresponding to
each gauge symmmetry which include constant and dynamic gauge. We discuss
cosmological implications of our model and show that it is compatible with the
observational data.Comment: 13 pages, 2 figures, accepted for publication in 'European Physical
Journal C
Phase space analysis of interacting dark energy in f(T) cosmology
In this paper, we examine the interacting dark energy model in
cosmology. We assume dark energy as a perfect fluid and choose a specific
cosmologically viable form . We show that there is one
attractor solution to the dynamical equation of Friedmann equations.
Further we investigate the stability in phase space for a general model
with two interacting fluids. By studying the local stability near the critical
points, we show that the critical points lie on the sheet in the
phase space, spanned by coordinates . From this critical sheet,
we conclude that the coupling between the dark energy and matter .Comment: 13 pages,2 figures, Published in "Central European Journal of
Physics
Interacting new generalized Chaplygin gas
We have presented a model in which the new generalized Chaplygin gas
interacts with matter. We find that there exists a stable scaling solution at
late times in the evolution of the universe. Moreover, the phantom crossing
scenario is observed in this model.Comment: 16 pages, 6 figures, accepted for publication in Int. J. Theor. Phy