698 citations
- Leibniz Institute for Solid State and Materials ResearchDE10 papers
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6 papers · 1 filter
Addendum to "Hyperbolic Space Cosmologies"
Chiang-Mei Chen, Pei-Ming Ho, Ishwaree P. Neupane +2
In our earlier paper [JHEP 0310 (2003) 058], we considered higher dimensional cosmological models with hyperbolic spaces. In particular the eternal accelerating expansion was obtai…
Towards inflation and dark energy cosmologies from modified Gauss-Bonnet theory
Ishwaree P Neupane, Benedict M N Carter
We consider a physically viable cosmological model that has a field dependent Gauss-Bonnet coupling in its effective action, in addition to a standard scalar field potential. The p…
Dynamical Relaxation of Dark Energy: A Solution to Early Inflation, Late-time Acceleration and the Cosmological Constant Problem
Ishwaree P. Neupane, Benedict M. N. Carter
In recent years different explanations are provided for both an inflation and a recent acceleration in the expansion of the universe. In this Letter we show that a model of physica…
Accelerating cosmologies from compactification with a twist
Ishwaree P. Neupane, David L. Wiltshire
It is demonstrated by explicit solutions of the (4+n)-dimensional vacuum Einstein equations that accelerating cosmologies in the Einstein conformal frame can be obtained by a time-…
Cosmic Acceleration and M Theory Cosmology
Ishwaree P. Neupane
This is a short overview of spatially flat (or open) four-dimensional accelerating cosmologies for some simple exponential potentials obtained by string or M theory compactificatio…
Accelerating Cosmologies from Exponential Potentials
Ishwaree P. Neupane
An exponential potential of the form arising from the hyperbolic or flux compactification of higher-dimensional theories is of interest for getting short pe…